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nctu.me

nctu.me is SSL secured

Free website and domain report on nctu.me

Last Updated: 23rd June, 2020 Update Now
Overview

Snoop Summary for nctu.me

This is a free and comprehensive report about nctu.me. Nctu.me is hosted in Columbus, Ohio in United States on a server with an IP address of 52.14.165.111, where USD is the local currency and the local language is English. Nctu.me has the potential to be earning an estimated $1 USD per day from advertising revenue. If nctu.me was to be sold it would possibly be worth $957 USD (based on the daily revenue potential of the website over a 24 month period). Nctu.me receives an estimated 455 unique visitors every day - a decent amount of traffic! This report was last updated 23rd June, 2020.

About nctu.me

Site Preview: nctu.me nctu.me
Title: NCTU Domain
Description:
Keywords and Tags:
Related Terms:
Fav Icon:
Age: Over 8 years old
Domain Created: 4th September, 2015
Domain Updated: 19th June, 2020
Domain Expires: 4th September, 2021
Review

Snoop Score

1/5

Valuation

$957 USD
Note: All valuation figures are estimates.

Popularity

Low
Note: Popularity is estimated.

Rank, Reach and Authority

Alexa Rank: 1,890,945
Alexa Reach:
SEMrush Rank (US):
SEMrush Authority Score:
Moz Domain Authority: 0
Moz Page Authority: 0

Organic vs Paid (Google Ads)

Traffic

Visitors

Daily Visitors: 455
Monthly Visitors: 13,860
Yearly Visitors: 166,207
Note: All visitors figures are estimates.

Visitors By Country

Revenue

Revenue

Daily Revenue: $1 USD
Monthly Revenue: $40 USD
Yearly Revenue: $474 USD
Note: All revenue figures are estimates.

Revenue By Country

SEO

Backlinks Analysis (SEMrush)

Top New Follow Links

Top Ranking Keywords (US)

Domain Analysis

Value Length
Domain: nctu.me 7
Domain Name: nctu 4
Extension (TLD): me 2
Expiry Check:

Page Speed Analysis

Average Load Time:
Load Time Comparison:

PageSpeed Insights

Avg. (All Categories) 61
Performance 85
Accessibility 78
Best Practices 77
SEO 60
Progressive Web App 7
0–49 (Fail) 50–89 (Average) 90–100 (Pass)
URL: https://nctu.me/
Updated: 23rd June, 2020

3.41 seconds
First Contentful Paint (FCP)
10%
54%
36%

0.00 seconds
First Input Delay (FID)
100%
0%
0%

Simulate loading on desktop
85

Performance

Indicates how well the page is performing and highlights opportunities where performance may be improved for nctu.me. This includes details about optimizing page load times which can result in a better user experience.

Metrics

Total Blocking Time — 110 ms
The total blocking time is the sum of all time periods between First Contentful Paint and Time to Interactive (when task length exceeded 50ms).
Cumulative Layout Shift — 0
Cumulative Layout Shift is the measurement of visible elements collective movement within the viewport.
View Data

Other

First CPU Idle — 2.4 s
The time taken for the page's main thread to be quiet enough to handle input.
Estimated Input Latency — 10 ms
The time taken for the page to respond to user input (during the busiest 5 second window of page load). Users are likely to perceive nctu.me as laggy when the latency is higher than 0.05 seconds.
Network Requests
Below is a list of network requests that were made during page load.
URL Start Time (Ms) End Time (Ms) Transfer Size (Bytes) Resource Size (Bytes) Status Code MIME Type Resource Type
http://nctu.me/
0
101.05200001271
263
0
301
text/html
https://nctu.me/
101.35199999786
199.46699999855
968
1003
200
text/html
Document
https://cdnjs.cloudflare.com/ajax/libs/semantic-ui/2.2.2/semantic.min.css
213.16400001524
270.49100000295
85736
549191
200
text/css
Stylesheet
https://nctu.me/styles.5ed23e0e59190237508c.css
213.45599999768
319.33500000741
6209
23234
200
text/css
Stylesheet
https://nctu.me/vendor.5c2f984b61182e384041.js
213.63100002054
348.95900002448
297041
999899
200
application/javascript
Script
https://nctu.me/bundle.fc93147e7a32f0ee20eb.js
213.969000004
384.59000000148
17758
100708
200
application/javascript
Script
https://fonts.googleapis.com/css?family=Lato:400,700,400italic,700italic&subset=latin
277.44500001427
288.64100002102
1566
3092
200
text/css
Stylesheet
https://www.google-analytics.com/analytics.js
622.90499999654
638.29699999769
19163
45958
200
text/javascript
Script
https://api.nctu.me/session/?
695.40100000449
873.67699999595
540
11
200
text/html
Fetch
https://www.google-analytics.com/r/collect?v=1&_v=j83&a=2073111904&t=pageview&_s=1&dl=https%3A%2F%2Fnctu.me%2F&dp=%2F&ul=en-us&de=UTF-8&dt=NCTU%20Domain&sd=24-bit&sr=800x600&vp=1350x940&je=0&_u=aEBAAEAB~&jid=1763356999&gjid=238347833&cid=1907251383.1592898303&uid=4b4e9c34-1767-4812-85a0-69b6bb252a25&tid=UA-76888832-4&_gid=983322192.1592898303&_r=1&z=364071577
706.76000000094
711.63299999898
865
0
302
text/html
https://stats.g.doubleclick.net/r/collect?v=1&aip=1&t=dc&_r=3&tid=UA-76888832-4&cid=1907251383.1592898303&jid=1763356999&uid=4b4e9c34-1767-4812-85a0-69b6bb252a25&_gid=983322192.1592898303&gjid=238347833&_v=j83&z=364071577
711.9010000024
715.19899999839
728
35
200
image/gif
Image
https://api.nctu.me/system/?
895.27700000326
2576.3500000176
660
98
200
text/html
Fetch
https://www.facebook.com/plugins/page.php?href=https%3A%2F%2Fwww.facebook.com%2Fnctu.me.domain&tabs=timeline&width=500&height=300&small_header=false&adapt_container_width=true&hide_cover=false&show_facepile=true&appId
904.88700001151
1024.4999999995
46338
236808
200
text/html
Document
https://nctu.me/eb2e4bc216df5a30beb87ed144909e7b.png
906.76000001258
980.35100000561
85307
84991
200
image/png
Image
909.02800002368
909.08700000728
0
960
200
image/png
Image
https://fonts.gstatic.com/s/lato/v16/S6uyw4BMUTPHjx4wXiWtFCc.woff2
913.79700001562
916.33500001626
14716
14044
200
font/woff2
Font
https://cdnjs.cloudflare.com/ajax/libs/semantic-ui/2.2.2/themes/default/assets/fonts/icons.woff2
914.21600000467
934.56100000185
72697
71896
200
application/octet-stream
Font
https://fonts.gstatic.com/s/lato/v16/S6u9w4BMUTPHh6UVSwiPGQ3q5d0.woff2
958.9510000078
962.29100000346
14850
14176
200
font/woff2
Font
https://static.xx.fbcdn.net/rsrc.php/v3/y6/l/0,cross/i4StkBpywsy.css?_nc_x=Ij3Wp8lg5Kz
1084.697000013
1125.0480000162
64825
235789
200
text/css
Stylesheet
https://static.xx.fbcdn.net/rsrc.php/v3/yf/l/0,cross/Nu_Ta-zzuqM.css?_nc_x=Ij3Wp8lg5Kz
1084.8890000198
1103.2709999999
2104
4026
200
text/css
Stylesheet
https://static.xx.fbcdn.net/rsrc.php/v3/yQ/l/0,cross/wMTfnDfLSee.css?_nc_x=Ij3Wp8lg5Kz
1085.1510000066
1102.418000024
9460
39804
200
text/css
Stylesheet
https://static.xx.fbcdn.net/rsrc.php/v3/yb/r/Dv8PLDZc80l.js?_nc_x=Ij3Wp8lg5Kz
1085.3690000076
1111.1519999977
87090
338492
200
application/x-javascript
Script
https://static.xx.fbcdn.net/rsrc.php/v3i7M54/yd/l/en_US/W42YOWvE58U.js?_nc_x=Ij3Wp8lg5Kz
1085.8100000187
1104.342000006
29762
107747
200
application/x-javascript
Script
https://static.xx.fbcdn.net/rsrc.php/v3/yh/r/9ems2_mieFy.js?_nc_x=Ij3Wp8lg5Kz
1086.008000013
1101.6950000194
2429
5258
200
application/x-javascript
Script
https://static.xx.fbcdn.net/rsrc.php/v3/yN/r/1bZYYvO3P1p.js?_nc_x=Ij3Wp8lg5Kz
1086.1660000228
1112.9120000114
5560
14209
200
application/x-javascript
Script
https://static.xx.fbcdn.net/rsrc.php/v3/yQ/r/4hH0a79Q08s.js?_nc_x=Ij3Wp8lg5Kz
1086.5219999978
1103.5760000232
10233
32164
200
application/x-javascript
Script
https://static.xx.fbcdn.net/rsrc.php/v3iLl54/yv/l/en_US/IE_oPE98_oD.js?_nc_x=Ij3Wp8lg5Kz
1086.7910000088
1116.5780000156
5556
14836
200
application/x-javascript
Script
https://static.xx.fbcdn.net/rsrc.php/v3/yr/r/H0NUMBsbxbQ.js?_nc_x=Ij3Wp8lg5Kz
1086.9830000156
1102.9430000053
4700
13889
200
application/x-javascript
Script
https://static.xx.fbcdn.net/rsrc.php/v3/yf/r/DtzWS6Jiyxc.js?_nc_x=Ij3Wp8lg5Kz
1087.1299999999
1103.9400000009
6786
18754
200
application/x-javascript
Script
https://static.xx.fbcdn.net/rsrc.php/v3iBgZ4/yh/l/en_US/xZZfGtXB8cx.js?_nc_x=Ij3Wp8lg5Kz
1087.3160000192
1105.2610000188
28651
120824
200
application/x-javascript
Script
https://static.xx.fbcdn.net/rsrc.php/v3/ya/r/nHPEF8fqnVk.js?_nc_x=Ij3Wp8lg5Kz
1087.5079999969
1108.064
10909
38092
200
application/x-javascript
Script
https://static.xx.fbcdn.net/rsrc.php/v3iFrr4/yN/l/en_US/-MrawDpMvef.js?_nc_x=Ij3Wp8lg5Kz
1088.0760000146
1107.2560000175
23874
95858
200
application/x-javascript
Script
https://static.xx.fbcdn.net/rsrc.php/v3/yA/r/IOcc7aIQQFV.js?_nc_x=Ij3Wp8lg5Kz
1088.3719999983
1106.0189999989
25460
88574
200
application/x-javascript
Script
https://static.xx.fbcdn.net/rsrc.php/v3ikDp4/yW/l/en_US/fUug-6-ia8b.js?_nc_x=Ij3Wp8lg5Kz
1088.5560000024
1109.5990000176
34391
120849
200
application/x-javascript
Script
https://static.xx.fbcdn.net/rsrc.php/v3/yE/r/qDXl2O_TmRT.js?_nc_x=Ij3Wp8lg5Kz
1088.9029999962
1115.0070000149
12132
36908
200
application/x-javascript
Script
https://static.xx.fbcdn.net/rsrc.php/v3/yb/r/J3kuz7CTutE.js?_nc_x=Ij3Wp8lg5Kz
1089.2900000035
1108.613999997
16905
62852
200
application/x-javascript
Script
https://static.xx.fbcdn.net/rsrc.php/v3iaIK4/yA/l/en_US/i-OcoHEWeun.js?_nc_x=Ij3Wp8lg5Kz
1089.5569999993
1110.199000017
23083
86157
200
application/x-javascript
Script
https://static.xx.fbcdn.net/rsrc.php/v3/yl/r/ukt4CL2riry.js?_nc_x=Ij3Wp8lg5Kz
1089.8110000126
1115.9679999982
12581
42032
200
application/x-javascript
Script
https://static.xx.fbcdn.net/rsrc.php/v3/yz/r/ntokPrZkT42.js?_nc_x=Ij3Wp8lg5Kz
1090.4660000233
1114.0690000029
26701
117599
200
application/x-javascript
Script
https://static.xx.fbcdn.net/rsrc.php/v3/yT/r/STtYSd0FVce.js?_nc_x=Ij3Wp8lg5Kz
1090.6590000086
1112.1940000157
951
380
200
application/x-javascript
Script
https://scontent-mia3-2.xx.fbcdn.net/v/t1.0-0/s526x296/58075_1060851647291166_6656963294095915841_n.png?_nc_cat=109&_nc_sid=dd9801&_nc_oc=AQkwh90pSbbCkum9aVC7-VdLXz6WGRSB0kAiVn9lrlg1xyoNZiETFYv2WRERnDsiy40&_nc_ht=scontent-mia3-2.xx&oh=362adbffcbd0c59e4871dd114f507994&oe=5F18957C
1163.8820000226
1284.9980000174
83815
83161
200
image/png
Image
https://scontent-mia3-2.xx.fbcdn.net/v/t31.0-1/cp0/p50x50/1015992_1060052094037788_1880061869471150503_o.png?_nc_cat=105&_nc_sid=dbb9e7&_nc_oc=AQn_Vf9HCwLRfJRGVkyd63AsPjhDglDUlToFpQYCR2UWDagwhSgt7HEs3UfUDvaBXbE&_nc_ht=scontent-mia3-2.xx&oh=e017ca78b4bacc101bea4b89b1ac85ab&oe=5F1656E3
1166.8110000028
1226.04400001
3258
2606
200
image/png
Image
https://static.xx.fbcdn.net/rsrc.php/v3/yI/r/QzTlY3HW13r.png
1292.826000019
1308.189000003
1951
1378
200
image/png
Image
https://static.xx.fbcdn.net/rsrc.php/v3/ya/r/jNEeuUggdkT.js?_nc_x=Ij3Wp8lg5Kz
1338.9909999969
1355.1940000034
8218
23392
200
application/x-javascript
Script
https://static.xx.fbcdn.net/rsrc.php/v3/yM/r/R7jW5M-0t-N.js?_nc_x=Ij3Wp8lg5Kz
1339.3110000179
1356.0590000125
14822
70708
200
application/x-javascript
Script
https://static.xx.fbcdn.net/rsrc.php/v3/ya/r/Mqqf_2Y8blO.js?_nc_x=Ij3Wp8lg5Kz
1339.5930000115
1357.0350000227
18194
69852
200
application/x-javascript
Script
https://static.xx.fbcdn.net/rsrc.php/v3/yQ/r/iWSXMD6tTj6.js?_nc_x=Ij3Wp8lg5Kz
1339.953000017
1361.8490000081
46613
155652
200
application/x-javascript
Script
https://www.facebook.com/pages/call_to_action/fetch_dialog_data/?id=1060052304037767&surface=pagePlugin&unit_type=VIEWER
1435.4010000243
1471.5600000054
1549
1118
200
application/x-javascript
XHR
https://www.facebook.com/platform/plugin/tab/renderer/
1444.3850000098
1595.032000012
14661
59622
200
application/x-javascript
XHR
https://www.facebook.com/platform/plugin/page/logging/
1446.7240000085
1473.8290000241
908
130
200
application/x-javascript
XHR
https://static.xx.fbcdn.net/rsrc.php/v3/yB/r/bSSs0_-Ke1M.png
1453.1350000179
1469.0500000142
11823
11205
200
image/png
Image
https://static.xx.fbcdn.net/rsrc.php/v3/y2/r/onuUJj0tCqE.png
1453.3030000166
1468.4600000037
4517
3944
200
image/png
Image
https://static.xx.fbcdn.net/rsrc.php/v3/yU/l/0,cross/K4TeAw_ETQ8.css?_nc_x=Ij3Wp8lg5Kz
1600.5140000198
1616.6210000229
6028
21853
200
text/css
Stylesheet
1600.4610000236
1600.5339999974
0
1802
200
text/css
Stylesheet
https://static.xx.fbcdn.net/rsrc.php/v3/yc/r/_N0Of8C_kVA.js?_nc_x=Ij3Wp8lg5Kz
1601.7130000109
1618.6910000106
16647
62756
200
application/x-javascript
Script
https://static.xx.fbcdn.net/rsrc.php/v3/yg/r/IWR2aPP6Zji.js?_nc_x=Ij3Wp8lg5Kz
1602.1910000127
1619.3020000064
7790
23151
200
application/x-javascript
Script
https://static.xx.fbcdn.net/rsrc.php/v3iEBX4/yA/l/en_US/wB7paFFzsPW.js?_nc_x=Ij3Wp8lg5Kz
1602.5810000137
1618.1750000105
6511
18247
200
application/x-javascript
Script
https://static.xx.fbcdn.net/rsrc.php/v3/yD/r/HiOkCyc_e9c.png
1680.30800001
1696.2250000215
4129
3556
200
image/png
Image
https://static.xx.fbcdn.net/rsrc.php/v3/y3/r/n-uOOobFC9i.png
1682.7639999974
1698.1180000002
3822
3249
200
image/png
Image
Network Round Trip Times — 0 ms
High Network RTT (Round Trip Times) can have a large impact on performance. Providing servers geographically closer to the user could improve performance.
Server Backend Latencies — 0 ms
High server latencies indicate the server is overloaded or has a poor backend performance.
Tasks
Below is a list of the top-level main thread tasks that executed during page load.
Start Time (Ms) End Time (Ms)
230.535
8.992
301.874
29.64
351.33
12.879
426.433
221.928
674.898
33.096
708.14
27.937
904.382
30.842
935.264
135.533
1070.856
9.093
1084.732
8.42
1093.341
12.17
1112.842
7.929
1120.794
11.739
1143.802
8.111
1164.524
6.874
1173.615
14.564
1194.935
12.827
1207.878
101.675
1309.719
22.282
1333.124
36.327
1385.754
11.09
1405.688
5.01
1413.825
63.487
1478.763
11.909
1507.594
6.835
1624.331
7.945
1663.17
5.044
1668.262
37.979
1706.54
36.246
1779.263
16.921
Diagnostics
Below is a collection of useful page vitals.
View Data
Metrics
Below is a collection of metrics.
View Data

Opportunities

Properly size images — Potential savings of 83 KB
Images can slow down the page's load time. Nctu.me should consider serving more appropriate-sized images.
URL Resource Size (Bytes) Potential Savings (Bytes)
https://nctu.me/eb2e4bc216df5a30beb87ed144909e7b.png
84991
84894
Defer offscreen images
Time to Interactive can be slowed down by resources on the page. Nctu.me should consider lazy-loading offscreen and hidden images.
Minify CSS
Cascading Style Sheets (CSS) files can contribute to network payload sizes. Nctu.me should consider minifying CSS files.
Minify JavaScript
JavaScript (JS) files can contribute to network payload sizes and increase script parse times. Nctu.me should consider minifying JS files.
Remove unused CSS — Potential savings of 144 KB
Dead and/or unused rules in Style Sheets (CSS) can contribute to network payload sizes. Nctu.me should consider removing dead rules from style sheets and deferring the loading of CSS not used for above-the-fold content.
URL Transfer Size (Bytes) Potential Savings (Bytes)
https://cdnjs.cloudflare.com/ajax/libs/semantic-ui/2.2.2/semantic.min.css
85736
83418
https://static.xx.fbcdn.net/rsrc.php/v3/y6/l/0,cross/i4StkBpywsy.css?_nc_x=Ij3Wp8lg5Kz
64825
63646
Efficiently encode images
Unoptimized images can consume more cellular data than what is necessary.
Serve images in next-gen formats — Potential savings of 129 KB
Image formats like PNG and JPEG have poor compression when compared to other next-gen formats, such as JPEG 200, JPEG XR and WebP.
URL Resource Size (Bytes) Potential Savings (Bytes)
https://scontent-mia3-2.xx.fbcdn.net/v/t1.0-0/s526x296/58075_1060851647291166_6656963294095915841_n.png?_nc_cat=109&_nc_sid=dd9801&_nc_oc=AQkwh90pSbbCkum9aVC7-VdLXz6WGRSB0kAiVn9lrlg1xyoNZiETFYv2WRERnDsiy40&_nc_ht=scontent-mia3-2.xx&oh=362adbffcbd0c59e4871dd114f507994&oe=5F18957C
83161
73955
https://nctu.me/eb2e4bc216df5a30beb87ed144909e7b.png
84991
58437
Enable text compression
Text-based resources should be served with compression, such as gzip, deflate or brotli.
Preconnect to required origins
Resource hints, such as 'preconnect' or 'dns-prefetch', may assist in establishing early connections to important third-party origins.
Initial server response time was short — Root document took 100 ms
It is advised to keep the server response time short for the main document, because all other requests depend on it.
Avoid multiple page redirects — Potential savings of 190 ms
Redirects can cause additional delays before the page can begin loading. Nctu.me should avoid multiple or unnecessary page redirects.
URL Time Spent (Ms)
(Start) http://nctu.me/
0
https://nctu.me/
190
Preload key requests
Key requests can be preloaded by using '<link rel=preload>'. Nctu.me should consider using '<link rel=preload>' to prioritize fetching resources that are currently requested later in page load.
Use video formats for animated content
Large GIFs are inefficient for delivering animated content. It is recommended to use MPEG4/WebM videos for animations and PNG/WebP for static images instead of GIF.

Diagnostics

Avoids enormous network payloads — Total size was 1,333 KB
Large network payloads can cost users money and are linked to long load times.
URL Transfer Size (Bytes)
https://nctu.me/vendor.5c2f984b61182e384041.js
297041
https://static.xx.fbcdn.net/rsrc.php/v3/yb/r/Dv8PLDZc80l.js?_nc_x=Ij3Wp8lg5Kz
87090
https://cdnjs.cloudflare.com/ajax/libs/semantic-ui/2.2.2/semantic.min.css
85736
https://nctu.me/eb2e4bc216df5a30beb87ed144909e7b.png
85307
https://scontent-mia3-2.xx.fbcdn.net/v/t1.0-0/s526x296/58075_1060851647291166_6656963294095915841_n.png?_nc_cat=109&_nc_sid=dd9801&_nc_oc=AQkwh90pSbbCkum9aVC7-VdLXz6WGRSB0kAiVn9lrlg1xyoNZiETFYv2WRERnDsiy40&_nc_ht=scontent-mia3-2.xx&oh=362adbffcbd0c59e4871dd114f507994&oe=5F18957C
83815
https://cdnjs.cloudflare.com/ajax/libs/semantic-ui/2.2.2/themes/default/assets/fonts/icons.woff2
72697
https://static.xx.fbcdn.net/rsrc.php/v3/y6/l/0,cross/i4StkBpywsy.css?_nc_x=Ij3Wp8lg5Kz
64825
https://static.xx.fbcdn.net/rsrc.php/v3/yQ/r/iWSXMD6tTj6.js?_nc_x=Ij3Wp8lg5Kz
46613
https://www.facebook.com/plugins/page.php?href=https%3A%2F%2Fwww.facebook.com%2Fnctu.me.domain&tabs=timeline&width=500&height=300&small_header=false&adapt_container_width=true&hide_cover=false&show_facepile=true&appId
46338
https://static.xx.fbcdn.net/rsrc.php/v3ikDp4/yW/l/en_US/fUug-6-ia8b.js?_nc_x=Ij3Wp8lg5Kz
34391
Uses efficient cache policy on static assets — 3 resources found
Nctu.me can speed up repeat visits by increasing the cache lifetime, which is essentially how long before a cached copy expires.
URL Cache TTL (Ms) Transfer Size (Bytes)
https://www.google-analytics.com/analytics.js
7200000
19163
https://scontent-mia3-2.xx.fbcdn.net/v/t1.0-0/s526x296/58075_1060851647291166_6656963294095915841_n.png?_nc_cat=109&_nc_sid=dd9801&_nc_oc=AQkwh90pSbbCkum9aVC7-VdLXz6WGRSB0kAiVn9lrlg1xyoNZiETFYv2WRERnDsiy40&_nc_ht=scontent-mia3-2.xx&oh=362adbffcbd0c59e4871dd114f507994&oe=5F18957C
1209600000
83815
https://scontent-mia3-2.xx.fbcdn.net/v/t31.0-1/cp0/p50x50/1015992_1060052094037788_1880061869471150503_o.png?_nc_cat=105&_nc_sid=dbb9e7&_nc_oc=AQn_Vf9HCwLRfJRGVkyd63AsPjhDglDUlToFpQYCR2UWDagwhSgt7HEs3UfUDvaBXbE&_nc_ht=scontent-mia3-2.xx&oh=e017ca78b4bacc101bea4b89b1ac85ab&oe=5F1656E3
1209600000
3258
Avoids an excessive DOM size — 83 elements
A large DOM (Document Object Model) will increase memory usage, cause longer system calculations as well as costly layout reflows.
Statistic Element Value
Total DOM Elements
83
Maximum DOM Depth
SHOW DETAILS
16
Maximum Child Elements
SHOW DETAILS
8
Avoid chaining critical requests — 5 chains found
Below is a list of Critical Request Chains, which shows which resources are loaded with a high priority. Nctu.me should consider reducing the length of chains, reducing the download size of resources, or deferring the download of unnecessary resources to improve page load.
User Timing marks and measures
Make use of the User Timing API to measure an app's real-world performance during key user experiences.
JavaScript execution time — 0.6 s
JavaScript (JS) execution time can be lowered by reducing the time required for parsing, compiling and executing JS. Delivering smaller JS payloads may help with this.
URL Total CPU Time (Ms) Script Evaluation (Ms) Script Parse (Ms)
https://nctu.me/vendor.5c2f984b61182e384041.js
275.796
126.414
15.481
https://nctu.me/
267.966
3.443
1.156
https://nctu.me/bundle.fc93147e7a32f0ee20eb.js
219.054
216.54
1.455
https://www.facebook.com/plugins/page.php?href=https%3A%2F%2Fwww.facebook.com%2Fnctu.me.domain&tabs=timeline&width=500&height=300&small_header=false&adapt_container_width=true&hide_cover=false&show_facepile=true&appId
133.93
43.469
8.439
Unattributable
103.197
1.345
0.171
https://static.xx.fbcdn.net/rsrc.php/v3/yb/r/Dv8PLDZc80l.js?_nc_x=Ij3Wp8lg5Kz
86.261
66.232
10.795
https://static.xx.fbcdn.net/rsrc.php/v3/yQ/r/iWSXMD6tTj6.js?_nc_x=Ij3Wp8lg5Kz
73.401
68.032
3.507
Minimizes main-thread work — 1.3 s
Main-thread work timing can be lowered by reducing the time required for parsing, compiling and executing JS. Delivering smaller JS payloads may help with this.
Category Time Spent (Ms)
Script Evaluation
582.75099999999
Style & Layout
278.553
Other
168.207
Rendering
95.695000000001
Script Parsing & Compilation
89.728
Parse HTML & CSS
83.031
Garbage Collection
25.945
Keep request counts low and transfer sizes small — 57 requests • 1,333 KB
It is advised to add a budgets.json file in order to set budgets for the quantity and size of page resources.
Resource Type Requests Transfer Size (Bytes)
Total
57
1364804
Script
29
820511
Image
9
199350
Stylesheet
7
175928
Font
3
102263
Document
2
47306
Other
7
19446
Media
0
0
Third-party
49
956058
Minimize third-party usage — Third-party code blocked the main thread for 10 ms
It is advised to either limit, remove or delay the loading of redundant third-party code which may be significantly impacting load performance.
Third-Party Transfer Size (Bytes) Main-Thread Blocking Time (Ms)
SHOW DETAILS
745737
7.318
SHOW DETAILS
158433
0
SHOW DETAILS
31132
0
SHOW DETAILS
20028
0
SHOW DETAILS
728
0
Largest Contentful Paint element — 1 element found
The element which was identified as the Largest Contentful Paint.
Element
若 IDOAuth 無法自動驗證，請聯絡 Facebook粉絲專頁 進行身份驗證！ 歡迎使用免費網域服務！ 多少人選擇NCTU.ME Domain 1 個可選…
Avoid large layout shifts — 5 elements found
Below is a list of all DOM elements that contribute to the CLS of the page.
Element
Be the first of your friends to like this NCTU.me 短網址及免費網域服務 about 3 weeks ago …
Be the first of your friends to like this NCTU.me 短網址及免費網域服務 about 3 weeks ago …
::after
聯絡我們
註冊說明
Uses passive listeners to improve scrolling performance
Improve the page's scroll performance by marking touch and wheel event listeners as 'passive'.
Avoids `document.write()`
Avoid or limit the use of external scripts that are dynamically injected via 'document.write()' as users on slow connections will be delayed by tens of seconds.

Budgets

Performance budget
It is advised to keep the quantity and size of all network requests under the targets set by the provided performance budget.
Timing budget
It is advised to set a timing budget to monitor the performance of your site.

Metrics

First Contentful Paint — 1.3 s
The time taken for the first image or text on the page to be rendered.
Speed Index — 1.4 s
The time taken for the page contents to be visibly populated.
Largest Contentful Paint — 1.6 s
The timing of the largest text or image that is painted.
Time to Interactive — 2.5 s
The time taken for the page to become fully interactive.

Other

Max Potential First Input Delay — 160 ms
Users could experience a delay when interacting with the page.
First Meaningful Paint — 1.5 s
The time taken for the primary content of the page to be rendered.

Opportunities

Eliminate render-blocking resources — Potential savings of 150 ms
Resources, such as JavaScript and style sheets, can block the first paint of the page. Nctu.me should consider delivering critical JavaScript/style sheets (JS/CSS) inline and deferring all non-critical JS/CSS.
URL Transfer Size (Bytes) Potential Savings (Ms)
https://cdnjs.cloudflare.com/ajax/libs/semantic-ui/2.2.2/semantic.min.css
85736
390
https://nctu.me/styles.5ed23e0e59190237508c.css
6209
190
Remove unused JavaScript — Potential savings of 503 KB
It is advised to remove unused JavaScript in order to reduce bytes consumed by network activity.
URL Transfer Size (Bytes) Potential Savings (Bytes)
https://nctu.me/vendor.5c2f984b61182e384041.js
297041
143062
https://static.xx.fbcdn.net/rsrc.php/v3/yb/r/Dv8PLDZc80l.js?_nc_x=Ij3Wp8lg5Kz
87090
51914
https://static.xx.fbcdn.net/rsrc.php/v3ikDp4/yW/l/en_US/fUug-6-ia8b.js?_nc_x=Ij3Wp8lg5Kz
34391
32775
https://static.xx.fbcdn.net/rsrc.php/v3/yz/r/ntokPrZkT42.js?_nc_x=Ij3Wp8lg5Kz
26701
24030
https://static.xx.fbcdn.net/rsrc.php/v3iBgZ4/yh/l/en_US/xZZfGtXB8cx.js?_nc_x=Ij3Wp8lg5Kz
28651
23026
https://static.xx.fbcdn.net/rsrc.php/v3/yQ/r/iWSXMD6tTj6.js?_nc_x=Ij3Wp8lg5Kz
46613
21811
https://static.xx.fbcdn.net/rsrc.php/v3iaIK4/yA/l/en_US/i-OcoHEWeun.js?_nc_x=Ij3Wp8lg5Kz
23083
20418
https://static.xx.fbcdn.net/rsrc.php/v3iFrr4/yN/l/en_US/-MrawDpMvef.js?_nc_x=Ij3Wp8lg5Kz
23874
19663
https://static.xx.fbcdn.net/rsrc.php/v3i7M54/yd/l/en_US/W42YOWvE58U.js?_nc_x=Ij3Wp8lg5Kz
29762
19162
https://static.xx.fbcdn.net/rsrc.php/v3/yA/r/IOcc7aIQQFV.js?_nc_x=Ij3Wp8lg5Kz
25460
18685
https://static.xx.fbcdn.net/rsrc.php/v3/ya/r/Mqqf_2Y8blO.js?_nc_x=Ij3Wp8lg5Kz
18194
16930
https://static.xx.fbcdn.net/rsrc.php/v3/yb/r/J3kuz7CTutE.js?_nc_x=Ij3Wp8lg5Kz
16905
15243
https://static.xx.fbcdn.net/rsrc.php/v3/yM/r/R7jW5M-0t-N.js?_nc_x=Ij3Wp8lg5Kz
14822
13901
https://static.xx.fbcdn.net/rsrc.php/v3/yc/r/_N0Of8C_kVA.js?_nc_x=Ij3Wp8lg5Kz
16647
13753
https://static.xx.fbcdn.net/rsrc.php/v3/yl/r/ukt4CL2riry.js?_nc_x=Ij3Wp8lg5Kz
12581
11465
https://static.xx.fbcdn.net/rsrc.php/v3/yE/r/qDXl2O_TmRT.js?_nc_x=Ij3Wp8lg5Kz
12132
10070
https://static.xx.fbcdn.net/rsrc.php/v3/ya/r/nHPEF8fqnVk.js?_nc_x=Ij3Wp8lg5Kz
10909
9816
https://nctu.me/bundle.fc93147e7a32f0ee20eb.js
17758
8020
https://static.xx.fbcdn.net/rsrc.php/v3/yQ/r/4hH0a79Q08s.js?_nc_x=Ij3Wp8lg5Kz
10233
7145
https://www.google-analytics.com/analytics.js
19163
6915
https://static.xx.fbcdn.net/rsrc.php/v3/yg/r/IWR2aPP6Zji.js?_nc_x=Ij3Wp8lg5Kz
7790
6777
https://static.xx.fbcdn.net/rsrc.php/v3/ya/r/jNEeuUggdkT.js?_nc_x=Ij3Wp8lg5Kz
8218
5788
https://static.xx.fbcdn.net/rsrc.php/v3/yN/r/1bZYYvO3P1p.js?_nc_x=Ij3Wp8lg5Kz
5560
4093
https://static.xx.fbcdn.net/rsrc.php/v3iEBX4/yA/l/en_US/wB7paFFzsPW.js?_nc_x=Ij3Wp8lg5Kz
6511
4003
https://static.xx.fbcdn.net/rsrc.php/v3/yf/r/DtzWS6Jiyxc.js?_nc_x=Ij3Wp8lg5Kz
6786
3856
https://static.xx.fbcdn.net/rsrc.php/v3/yr/r/H0NUMBsbxbQ.js?_nc_x=Ij3Wp8lg5Kz
4700
2590

Diagnostics

Ensure text remains visible during webfont load
Make use of the font-display CSS feature, which will ensure text is user-visible while webfonts are loading.
URL Potential Savings (Ms)
https://fonts.gstatic.com/s/lato/v16/S6uyw4BMUTPHjx4wXiWtFCc.woff2
2.5380000006407
https://cdnjs.cloudflare.com/ajax/libs/semantic-ui/2.2.2/themes/default/assets/fonts/icons.woff2
20.344999997178
https://fonts.gstatic.com/s/lato/v16/S6u9w4BMUTPHh6UVSwiPGQ3q5d0.woff2
3.33999999566
78

Accessibility

Indicates how accessible the page is and highlights opportunities where the page can be made more accessible to users of nctu.me. This includes details about various page attributes that can be optimized.

Navigation

`[accesskey]` values are unique
Access keys assist users with focusing on different parts of the page. Each access key should be unique for proper navigation.
The page contains a heading, skip link, or landmark region
It is advised to provide ways to bypass repetitive content, allowing users to navigate the page efficiently.
`[id]` attributes on active, focusable elements are unique
Ensure all focusable elements have a unique id value to allow them to be visible to users of assistive technologies, like a screen reader.
No element has a `[tabindex]` value greater than 0
Although technically valid, a tabindex value greater than 0 often creates frustrating experiences for users who rely on assistive technologies.

ARIA

`[aria-*]` attributes match their roles
Avoid mismatching 'aria-*' attributes and their 'role' value, as it invalidates the attribute.
`[aria-hidden="true"]` is not present on the document `<body>`
If aria-hidden=true is set on the document body, assistive technologies, like a screen reader will work inconsistently.
`[aria-hidden="true"]` elements do not contain focusable descendents
Interactive elements within an aria-hidden=true element are unavailable to users of assistive technologies, like a screen reader.
ARIA input fields have accessible names
Generic names are announced to users of assistive technologies, like a screen reader, when an input field does not have an accessible name specified.
`[role]`s have all required `[aria-*]` attributes
Some ARIA roles have required 'aria-*' attributes, which provide essential information about state and functionality.
Elements with an ARIA `[role]` that require children to contain a specific `[role]` have all required children.
Some ARIA parent roles cannot perform their intended functions if specific child roles are not used.
`[role]`s are contained by their required parent element
Some ARIA child roles cannot perform their intended functions if specific parent roles are not used.
`[role]` values are valid
All ARIA roles require valid values to perform their intended functions.
ARIA toggle fields have accessible names
Generic names are announced to users of assistive technologies, like a screen reader, when a toggle field does not have an accessible name specified.
`[aria-*]` attributes have valid values
ARIA attributes cannot be interpreted with invalid values when used by screen readers and other assistive technologies.
`[aria-*]` attributes are valid and not misspelled
ARIA attributes cannot be interpreted with invalid names when used by screen readers and other assistive technologies.
ARIA IDs are unique
Ensure all ARIA ID values are unique to prevent elements from being overlooked by assistive technologies, like a screen reader.

Names and labels

Buttons have an accessible name
Buttons become unusable as they are announced simply as "button" when the button does not have an accessible name, when used by screen readers and other assistive technologies.
Document has a `<title>` element
Search engines, screen reader users and other assistive technology users rely on the title to provide an overview of the page and to help determine if the page is relevant to their search.
No form fields have multiple labels
Having multiple labels for form fields can be confusing to assistive technologies, like a screen reader.
`<input type="image">` elements have `[alt]` text
Input buttons with alternative text assist screen readers and other assistive technology users to understand its purpose.
Form elements have associated labels
Screen readers and other assistive technologies rely on labels to properly announce form controls.
Links have a discernible name
In order to improve the navigation for screen reader and other assistive technology users, use link text that is unique, focusable and discernible.
`<object>` elements have `[alt]` text
It is advised that alt text is used on '<object>' elements in order to provide meaning to screen reader and other assistive technology users, as these technologies are unable to translate non-text content.

Tables and lists

`<dl>`'s contain only properly-ordered `<dt>` and `<dd>` groups, `<script>`, `<template>` or `<div>` elements.
Screen readers and other assistive technologies may produce poor and inaccurate output when definition lists are not properly marked up.
Definition list items are wrapped in `<dl>` elements
In order for screen readers and other assistive technologies to properly announce definition list items ('<dt>' and '<dd>'), they must be wrapped in parent a '<dl>' element.
Presentational `<table>` elements avoid using `<th>`, `<caption>` or the `[summary]` attribute.
It is advised to not include data elements in tables which are used for layout purposes, as it may create confusion for screen reader and other assistive technology users.
Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).
Use proper list structure to aid screen readers and other assistive technologies.
List items (`<li>`) are contained within `<ul>` or `<ol>` parent elements
In order for screen readers to announce list items, ensure that list items ('<li>') are contained within parent '<ul>' or '<ol>' tags.
Cells in a `<table>` element that use the `[headers]` attribute refer to table cells within the same table.
Screen readers and other assistive technologies have features to make navigating tables easier. Ensure that '<td>' cells using the headers attribute only refer to other cells in the same table, to improve screen reader user experience.
`<th>` elements and elements with `[role="columnheader"/"rowheader"]` have data cells they describe.
Screen readers and other assistive technologies have features to make navigating tables easier. Ensure that table headers refer to some set of cells, to improve screen reader user experience.

Internationalization and localization

`<html>` element has a `[lang]` attribute
It is advised to provide a lang attribute so that screen readers and other assistive technologies are guaranteed to announce the page's text correctly. When not provided, the user's default language setting will be used which may cause inaccuracies.
`<html>` element has a valid value for its `[lang]` attribute
Specify a valid BCP 47 language in order to help screen readers and other assistive technologies announce text properly.
`[lang]` attributes have a valid value
Specify a valid BCP 47 language on elements in order to help screen readers and other assistive technologies announce text properly.

Best practices

The document does not use `<meta http-equiv="refresh">`
Pages that refresh automatically cause a poor user experience as focus is directed back to the top of the page unexpectedly.
`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5.
For users with low vision who rely on screen magnification, ensure that zooming is not disabled.

Audio and video

`<video>` elements contain a `<track>` element with `[kind="captions"]`
Nctu.me may provide assistance to deaf or hearing-impaired users with captions on videos.
`<video>` elements contain a `<track>` element with `[kind="description"]`
Nctu.me may provide relevant information that dialogue cannot, by using audio descriptions.

Contrast

Background and foreground colors do not have a sufficient contrast ratio.
Many (if not most) users find low-contrast text difficult or impossible to read.
Failing Elements
NCTU.ME domain Hosting
首頁
聯絡我們
註冊說明
Q & A
登入
Facebook粉絲專頁
Facebook粉絲專頁
聯絡我們
隱私及服務條款
DNSimple Status

Names and labels

`<frame>` or `<iframe>` elements do not have a title
Screen reader users and other assistive technology users rely on frame titles to describe the contents of frames.
Failing Elements
iframe
Image elements do not have `[alt]` attributes
Provide short and descriptive alternative text where possible on informative elements.
Failing Elements
img

Navigation

Heading elements are not in a sequentially-descending order
Properly order all headers and do not skip heading levels to better the navigation and readability for users of assistive technologies, like a screen reader.
Failing Elements
多少人選擇NCTU.ME Domain
按個讚吧！

Manual Checks

The page has a logical tab order
The visual layout should be logical in its tab order and users cannot focus elements that are offscreen.
Interactive controls are keyboard focusable
Ensure that custom interactive controls are keyboard focusable and that a focus indicator is displayed.
Interactive elements indicate their purpose and state
Ensure that interactive elements (such as links and buttons) are distinguishable from non-interactive elements and that they indicate their state.
The user's focus is directed to new content added to the page
When new content (such as a dialogue) is added to the page, the user's focus should be directed to it.
User focus is not accidentally trapped in a region
Avoid focus being accidentally trapped when a user tabs in and out of controls or regions on page.
Custom controls have associated labels
Ensure that custom interactive controls have associated labels, which are provided by aria-label and aria-labelledby attributes.
Custom controls have ARIA roles
Ensure that all custom interactive controls have appropriate ARIA roles.
Visual order on the page follows DOM order
Ensure that the DOM order matches with the page's visual order, in order to improve navigation for screen readers and other assistive technologies.
Offscreen content is hidden from assistive technology
Ensure that offscreen content is hidden through the use of "display:none" styling or the aria-hidden attribute.
HTML5 landmark elements are used to improve navigation
Elements such as <main> and <nav> are recommended as they are used by screen readers and other assistive technologies to improve keyboard navigation.
77

Best Practices

Indicates the recommended, best practices currently in place on the page and highlights the best practices that nctu.me should incorporate. This includes practices such as protecting pages with HTTPS.

Audits

Avoids requesting the geolocation permission on page load
When requesting a user's location, provide context or consider tying the request to a user action to avoid confusion and mistrust from users.
Avoids requesting the notification permission on page load
When requesting permission to send notifications, provide context or consider tying the request to a user action to avoid confusion and mistrust from users.

Audits

Allows users to paste into password fields
Ensure that password inputs may be pasted into to aid in the user's ability to use password managers and improve security.
Displays images with correct aspect ratio
Ensure that image display dimensions match their natural aspect ratio.
Displays images with appropriate size
For maximum image clarity, ensure images have natural dimensions and are proportional to the display size and pixel ratio.

Audits

Page has the HTML doctype
Ensure a doctype is specified to prevent the browser from switching to quirks-mode.
Properly defines charset
It is advised to declare a character encoding, optionally via a <meta> tag in the first 1024 bytes of the HTML or in the Content-Type HTTP response header.

Audits

Avoids Application Cache
Application cache is deprecated and is no longer recommended.
Detected JavaScript libraries
Below is a list of all front-end JavaScript libraries that were detected on the page.
Name Version
React
Lo-Dash
4.17.5
core-js
Avoids deprecated APIs
Avoid deprecated APIs which will eventually be removed the browser.
No browser errors logged to the console
Below is a list of all errors logged to the console, which indicate unresolved problems on the site.

Audits

Does not use HTTPS — 1 insecure request found
Ensure that all pages are protected with HTTPS (including those that do not handle sensitive data) as HTTPS prevents tampering and passive listening on communications between the app and its users. Additionally, HTTPS is a prerequisite for HTTP/2 and many new web platform APIs.
Insecure URL
http://nctu.me/
Links to cross-origin destinations are unsafe
Improve performance and prevent security vulnerabilities by adding rel="noopener" and rel="noreferrer" to external links.
Includes front-end JavaScript libraries with known security vulnerabilities — 4 vulnerabilities detected
Ensure that the use of third-party scripts is minimal and that only trusted third-party scripts are used as some may contain known security vulnerabilities which may be exploited by attackers.
Library Version Vulnerability Count Highest Severity
SHOW DETAILS
4
High
60

SEO

Indicates how well the page is optimized for ranking in search engines and highlights Search Engine Optimization (SEO) opportunities for nctu.me. This includes optimizations such as providing meta data.

Content Best Practices

Document has a `<title>` element
Search engines, screen reader users and other assistive technology users rely on the title to provide an overview of the page and to help determine if the page is relevant to their search.
Links have descriptive text
Make use of descriptive link text to assist search engines in understanding the content.
Document has a valid `hreflang`
Search engines can be instructed to list specific versions of a page for a given language or region through the use of hreflang links.
Document has a valid `rel=canonical`
Search engines can be suggested which URL should be shown in search results through the use of canonical links.
Document avoids plugins
The content of plugins cannot be indexed by search engines and many devices either restrict or do not support them.

Crawling and Indexing

Page has successful HTTP status code
Avoid pages with unsuccessful HTTP status codes as they may not be indexed by search engines.
Page isn’t blocked from indexing
Pages that cannot be crawled by search engines cannot be indexed or included in their search results. Ensure that search engines have permission to crawl all pages that should be indexed.

Mobile Friendly

Document uses legible font sizes
Font sizes of 12px or less are too small to most mobile users without user gestures and further action. Aim for more than 60% of page text to use font sizes greater than 12px.
Tap targets are sized appropriately
Interactive elements (such as buttons and links) should be appropriately spaced, sized and easy enough to select or tap with regard to their surrounding elements.

Mobile Friendly

Does not have a `<meta name="viewport">` tag with `width` or `initial-scale`
It is advised to use a '<meta name="viewport">' tag for the optimization of nctu.me on mobile screens.

Content Best Practices

Document does not have a meta description
Meta descriptions may be used by search engines when displaying a link to the page and should concisely summarize the page's content.
Image elements do not have `[alt]` attributes
Provide short and descriptive alternative text where possible on informative elements.
Failing Elements
img

Crawling and Indexing

robots.txt is not valid — 3 errors found
Malformed robots.txt files prevent crawlers from understanding how a site wants to be crawled or indexed, which can be devastating to SEO.
Line # Content Error
1
<!DOCTYPE html><html lang=en><head><meta charset=UTF-8><meta property=og:title content="NCTU.me Domain Hosting"><meta property=og:type content=website><meta property=og:url content=https://nctu.me><meta property=og:image content=https://nctu.me/src/static/fb-og.png><meta property=og:site_name content=NCTU.me><meta property=og:description content=一個提供免費網域及交大專屬短網址服務><link rel=stylesheet href=//cdnjs.cloudflare.com/ajax/libs/semantic-ui/2.2.2/semantic.min.css><title>NCTU Domain</title><link rel="shortcut icon" href=favicon-32x32.png><link href=styles.5ed23e0e59190237508c.css rel=stylesheet></head><body><div id=app><div class="ui loader" style="height: 100vh; width: 100vw;"></div></div><script>window.addEventListener("hashchange", function() {
Unknown directive
2
scrollBy(0, -100)
Syntax not understood
3
})</script><script type=text/javascript src=vendor.5c2f984b61182e384041.js></script><script type=text/javascript src=bundle.fc93147e7a32f0ee20eb.js></script></body></html>
Syntax not understood

Manual Checks

Structured data is valid
Structured data can be validated through the use of the Structured Data Testing Tool and the Structured Data Linter.
7

Progressive Web App

Indicates how valid the aspects of a Progressive Web App (PWA) are for the page and highlights opportunities to enable/improve the PWA of nctu.me. This includes details about web app manifests.

PWA Optimized

Redirects HTTP traffic to HTTPS
It is advised to redirect all HTTP traffic to HTTPS, in order to enable secure web features for all users.
Content is sized correctly for the viewport
Ensure that the width of the app's content matches the width of the viewport, otherwise the app might not be optimized for mobile screens.

Fast and reliable

Page load is not fast enough on mobile networks — Interactive on simulated mobile network at 12.0 s
Ensure that the page loads fast enough over a cellular network, to ensure good mobile user experience.
Current page does not respond with a 200 when offline
In order for Progressive Web Apps to be made available offline, ensure that the app is using a service worker.
`start_url` does not respond with a 200 when offline
Consider using a service worker for Progressive Web Apps to ensure greater reliability for the user, in the case of poor network conditions.

Installable

Does not use HTTPS — 1 insecure request found
Ensure that all pages are protected with HTTPS (including those that do not handle sensitive data) as HTTPS prevents tampering and passive listening on communications between the app and its users. Additionally, HTTPS is a prerequisite for HTTP/2 and many new web platform APIs.
Insecure URL
http://nctu.me/
Does not register a service worker that controls page and `start_url`
A service worker is used to provide Progressive Web Apps the use of features such as working offline, the ability for the app to be added to the homescreen as well as push notifications.
Web app manifest does not meet the installability requirements
User engagement may be increased by leveraging the browsers ability to proactively prompt users to add the app to their homescreen.
View Data

PWA Optimized

Is not configured for a custom splash screen
Themed splash screens ensure a high-quality user experience at launch for app users.
View Data
Does not set a theme color for the address bar.
A theme may be applied to the browser address bar, which ideally can be made to match the site.
View Data
Does not have a `<meta name="viewport">` tag with `width` or `initial-scale`
It is advised to use a '<meta name="viewport">' tag for the optimization of nctu.me on mobile screens.
Does not provide fallback content when JavaScript is not available
Apps should display alternative content for when JavaScript is disabled.
Does not provide a valid `apple-touch-icon`
iOS users of Progressive Web Apps will benefit from an apple touch icon, which can be defined with 'apple-touch-icon', which must point to a non-transparent 192px (or 180px) square PNG.
Manifest doesn't have a maskable icon
Maskable icons are great to ensure that images fill the entire shape when installing the app on a device.

Manual Checks

Site works cross-browser
Ensure that the Progressive Web App works correctly across every major browser.
Page transitions don't feel like they block on the network
Users perceive apps with responsive, snappy transitions as higher peforming and ensures a great user experience, even on a slow network.
Each page has a URL
Ensure that all pages are deep linkable via URL. They should also be unique for the purpose of shareability on social media.
Avg. (All Categories) 48
Performance 30
Accessibility 78
Best Practices 77
SEO 50
Progressive Web App 7
0–49 (Fail) 50–89 (Average) 90–100 (Pass)
Simulate loading on mobile
30

Performance

Indicates how well the page is performing and highlights opportunities where performance may be improved for nctu.me. This includes details about optimizing page load times which can result in a better user experience.

Metrics

Cumulative Layout Shift — 0
Cumulative Layout Shift is the measurement of visible elements collective movement within the viewport.
View Data

Opportunities

Defer offscreen images
Time to Interactive can be slowed down by resources on the page. Nctu.me should consider lazy-loading offscreen and hidden images.
Minify CSS
Cascading Style Sheets (CSS) files can contribute to network payload sizes. Nctu.me should consider minifying CSS files.
Minify JavaScript
JavaScript (JS) files can contribute to network payload sizes and increase script parse times. Nctu.me should consider minifying JS files.
Efficiently encode images
Unoptimized images can consume more cellular data than what is necessary.
Enable text compression
Text-based resources should be served with compression, such as gzip, deflate or brotli.
Preconnect to required origins
Resource hints, such as 'preconnect' or 'dns-prefetch', may assist in establishing early connections to important third-party origins.
Initial server response time was short — Root document took 30 ms
It is advised to keep the server response time short for the main document, because all other requests depend on it.
Avoid multiple page redirects — Potential savings of 630 ms
Redirects can cause additional delays before the page can begin loading. Nctu.me should avoid multiple or unnecessary page redirects.
URL Time Spent (Ms)
(Start) http://nctu.me/
0
https://nctu.me/
630
Preload key requests
Key requests can be preloaded by using '<link rel=preload>'. Nctu.me should consider using '<link rel=preload>' to prioritize fetching resources that are currently requested later in page load.
Use video formats for animated content
Large GIFs are inefficient for delivering animated content. It is recommended to use MPEG4/WebM videos for animations and PNG/WebP for static images instead of GIF.

Diagnostics

Avoids enormous network payloads — Total size was 1,336 KB
Large network payloads can cost users money and are linked to long load times.
URL Transfer Size (Bytes)
https://nctu.me/vendor.5c2f984b61182e384041.js
297041
https://static.xx.fbcdn.net/rsrc.php/v3/yb/r/Dv8PLDZc80l.js?_nc_x=Ij3Wp8lg5Kz
87090
https://cdnjs.cloudflare.com/ajax/libs/semantic-ui/2.2.2/semantic.min.css
85752
https://nctu.me/eb2e4bc216df5a30beb87ed144909e7b.png
85307
https://scontent-mia3-2.xx.fbcdn.net/v/t1.0-0/s526x296/58075_1060851647291166_6656963294095915841_n.png?_nc_cat=109&_nc_sid=dd9801&_nc_oc=AQkwh90pSbbCkum9aVC7-VdLXz6WGRSB0kAiVn9lrlg1xyoNZiETFYv2WRERnDsiy40&_nc_ht=scontent-mia3-2.xx&oh=362adbffcbd0c59e4871dd114f507994&oe=5F18957C
83675
https://cdnjs.cloudflare.com/ajax/libs/semantic-ui/2.2.2/themes/default/assets/fonts/icons.woff2
72697
https://static.xx.fbcdn.net/rsrc.php/v3/y6/l/0,cross/i4StkBpywsy.css?_nc_x=Ij3Wp8lg5Kz
64825
https://static.xx.fbcdn.net/rsrc.php/v3/yQ/r/iWSXMD6tTj6.js?_nc_x=Ij3Wp8lg5Kz
46613
https://www.facebook.com/plugins/page.php?href=https%3A%2F%2Fwww.facebook.com%2Fnctu.me.domain&tabs=timeline&width=500&height=300&small_header=false&adapt_container_width=true&hide_cover=false&show_facepile=true&appId
46562
https://static.xx.fbcdn.net/rsrc.php/v3ikDp4/yW/l/en_US/fUug-6-ia8b.js?_nc_x=Ij3Wp8lg5Kz
34391
Uses efficient cache policy on static assets — 4 resources found
Nctu.me can speed up repeat visits by increasing the cache lifetime, which is essentially how long before a cached copy expires.
URL Cache TTL (Ms) Transfer Size (Bytes)
https://www.google-analytics.com/analytics.js
7200000
19164
https://scontent-mia3-2.xx.fbcdn.net/v/t1.0-0/s526x296/58075_1060851647291166_6656963294095915841_n.png?_nc_cat=109&_nc_sid=dd9801&_nc_oc=AQkwh90pSbbCkum9aVC7-VdLXz6WGRSB0kAiVn9lrlg1xyoNZiETFYv2WRERnDsiy40&_nc_ht=scontent-mia3-2.xx&oh=362adbffcbd0c59e4871dd114f507994&oe=5F18957C
1209600000
83675
https://scontent-mia3-2.xx.fbcdn.net/v/t31.0-1/cp0/p50x50/1015992_1060052094037788_1880061869471150503_o.png?_nc_cat=105&_nc_sid=dbb9e7&_nc_oc=AQn_Vf9HCwLRfJRGVkyd63AsPjhDglDUlToFpQYCR2UWDagwhSgt7HEs3UfUDvaBXbE&_nc_ht=scontent-mia3-2.xx&oh=e017ca78b4bacc101bea4b89b1ac85ab&oe=5F1656E3
1209600000
3118
https://scontent-mia3-2.xx.fbcdn.net/v/t31.0-1/cp0/p50x50/1015992_1060052094037788_1880061869471150503_o.png?_nc_cat=105&_nc_sid=dbb9e7&_nc_ohc=o5TIee9NVekAX-ge0v3&_nc_ht=scontent-mia3-2.xx&oh=363c9c775a12bd11b4408cf7512e0661&oe=5F1656E3
1209600000
3118
Avoids an excessive DOM size — 83 elements
A large DOM (Document Object Model) will increase memory usage, cause longer system calculations as well as costly layout reflows.
Statistic Element Value
Total DOM Elements
83
Maximum DOM Depth
SHOW DETAILS
16
Maximum Child Elements
SHOW DETAILS
8
Avoid chaining critical requests — 5 chains found
Below is a list of Critical Request Chains, which shows which resources are loaded with a high priority. Nctu.me should consider reducing the length of chains, reducing the download size of resources, or deferring the download of unnecessary resources to improve page load.
User Timing marks and measures
Make use of the User Timing API to measure an app's real-world performance during key user experiences.
Keep request counts low and transfer sizes small — 58 requests • 1,336 KB
It is advised to add a budgets.json file in order to set budgets for the quantity and size of page resources.
Resource Type Requests Transfer Size (Bytes)
Total
58
1367737
Script
29
820512
Image
10
202188
Stylesheet
7
175815
Font
3
102263
Document
2
47530
Other
7
19429
Media
0
0
Third-party
50
959006
Largest Contentful Paint element — 1 element found
The element which was identified as the Largest Contentful Paint.
Element
若 IDOAuth 無法自動驗證，請聯絡 Facebook粉絲專頁 進行身份驗證！ 歡迎使用免費網域服務！ 多少人選擇NCTU.ME Domain 1 個可選…
Avoid large layout shifts — 5 elements found
Below is a list of all DOM elements that contribute to the CLS of the page.
Element
::after
聯絡我們
註冊說明
為什麼選擇NCTU.ME Domain?
Q & A
Uses passive listeners to improve scrolling performance
Improve the page's scroll performance by marking touch and wheel event listeners as 'passive'.
Avoids `document.write()`
Avoid or limit the use of external scripts that are dynamically injected via 'document.write()' as users on slow connections will be delayed by tens of seconds.

Budgets

Performance budget
It is advised to keep the quantity and size of all network requests under the targets set by the provided performance budget.
Timing budget
It is advised to set a timing budget to monitor the performance of your site.

Other

Network Requests
Below is a list of network requests that were made during page load.
URL Start Time (Ms) End Time (Ms) Transfer Size (Bytes) Resource Size (Bytes) Status Code MIME Type Resource Type
http://nctu.me/
0
57.571000012103
248
0
301
text/html
https://nctu.me/
57.884000008926
83.253999997396
968
1003
200
text/html
Document
https://cdnjs.cloudflare.com/ajax/libs/semantic-ui/2.2.2/semantic.min.css
96.420000016224
150.01300000586
85752
549191
200
text/css
Stylesheet
https://nctu.me/styles.5ed23e0e59190237508c.css
96.699000016088
123.73800002388
6209
23234
200
text/css
Stylesheet
https://nctu.me/vendor.5c2f984b61182e384041.js
96.837999997661
230.50400000648
297041
999899
200
application/javascript
Script
https://nctu.me/bundle.fc93147e7a32f0ee20eb.js
97.208000021055
219.86700000707
17758
100708
200
application/javascript
Script
https://fonts.googleapis.com/css?family=Lato:400,700,400italic,700italic&subset=latin
156.22100001201
174.2470000172
1437
3092
200
text/css
Stylesheet
https://www.google-analytics.com/analytics.js
452.19900002121
464.72099999664
19164
45958
200
text/javascript
Script
https://api.nctu.me/session/?
492.61600000318
522.26500000688
540
11
200
text/html
Fetch
https://www.google-analytics.com/r/collect?v=1&_v=j83&a=694339678&t=pageview&_s=1&dl=https%3A%2F%2Fnctu.me%2F&dp=%2F&ul=en-us&de=UTF-8&dt=NCTU%20Domain&sd=24-bit&sr=360x640&vp=980x1742&je=0&_u=aEBAAEAB~&jid=541921989&gjid=191733252&cid=1671039576.1592898315&uid=68ebeaa3-9bf6-42e1-8018-75aa65cfff56&tid=UA-76888832-4&_gid=1710301297.1592898315&_r=1&z=736114049
501.84800001443
520.42700001039
867
0
302
text/html
https://stats.g.doubleclick.net/r/collect?v=1&aip=1&t=dc&_r=3&tid=UA-76888832-4&cid=1671039576.1592898315&jid=541921989&uid=68ebeaa3-9bf6-42e1-8018-75aa65cfff56&_gid=1710301297.1592898315&gjid=191733252&_v=j83&z=736114049
520.66700000432
524.14399999543
728
35
200
image/gif
Image
https://api.nctu.me/system/?
543.4210000094
583.43300002161
660
98
200
text/html
Fetch
https://www.facebook.com/plugins/page.php?href=https%3A%2F%2Fwww.facebook.com%2Fnctu.me.domain&tabs=timeline&width=500&height=300&small_header=false&adapt_container_width=true&hide_cover=false&show_facepile=true&appId
550.47899999772
660.51000001607
46562
236953
200
text/html
Document
https://nctu.me/eb2e4bc216df5a30beb87ed144909e7b.png
551.27200001152
623.73900000239
85307
84991
200
image/png
Image
554.26100001205
554.31500001578
0
960
200
image/png
Image
https://fonts.gstatic.com/s/lato/v16/S6uyw4BMUTPHjx4wXiWtFCc.woff2
558.23200001032
560.77199999709
14717
14044
200
font/woff2
Font
https://cdnjs.cloudflare.com/ajax/libs/semantic-ui/2.2.2/themes/default/assets/fonts/icons.woff2
558.64500001189
579.83600001899
72697
71896
200
application/octet-stream
Font
https://fonts.gstatic.com/s/lato/v16/S6u9w4BMUTPHh6UVSwiPGQ3q5d0.woff2
594.71200002008
598.31699999631
14849
14176
200
font/woff2
Font
https://static.xx.fbcdn.net/rsrc.php/v3/y6/l/0,cross/i4StkBpywsy.css?_nc_x=Ij3Wp8lg5Kz
716.39600000344
758.21500000893
64825
235789
200
text/css
Stylesheet
https://static.xx.fbcdn.net/rsrc.php/v3/yf/l/0,cross/Nu_Ta-zzuqM.css?_nc_x=Ij3Wp8lg5Kz
716.58500001649
732.56400000537
2104
4026
200
text/css
Stylesheet
https://static.xx.fbcdn.net/rsrc.php/v3/yQ/l/0,cross/wMTfnDfLSee.css?_nc_x=Ij3Wp8lg5Kz
716.69400000246
737.47900000308
9460
39804
200
text/css
Stylesheet
https://static.xx.fbcdn.net/rsrc.php/v3/yb/r/Dv8PLDZc80l.js?_nc_x=Ij3Wp8lg5Kz
716.84599999571
741.4830000198
87090
338492
200
application/x-javascript
Script
https://static.xx.fbcdn.net/rsrc.php/v3i7M54/yd/l/en_US/W42YOWvE58U.js?_nc_x=Ij3Wp8lg5Kz
716.98900000774
734.76099999971
29762
107747
200
application/x-javascript
Script
https://static.xx.fbcdn.net/rsrc.php/v3/yh/r/9ems2_mieFy.js?_nc_x=Ij3Wp8lg5Kz
717.13200001977
732.11900002207
2429
5258
200
application/x-javascript
Script
https://static.xx.fbcdn.net/rsrc.php/v3/yN/r/1bZYYvO3P1p.js?_nc_x=Ij3Wp8lg5Kz
717.43700001389
732.9520000203
5560
14209
200
application/x-javascript
Script
https://static.xx.fbcdn.net/rsrc.php/v3/yQ/r/4hH0a79Q08s.js?_nc_x=Ij3Wp8lg5Kz
717.59100002237
733.74600001262
10233
32164
200
application/x-javascript
Script
https://static.xx.fbcdn.net/rsrc.php/v3iLl54/yv/l/en_US/IE_oPE98_oD.js?_nc_x=Ij3Wp8lg5Kz
717.7570000058
733.29900001409
5556
14836
200
application/x-javascript
Script
https://static.xx.fbcdn.net/rsrc.php/v3/yr/r/H0NUMBsbxbQ.js?_nc_x=Ij3Wp8lg5Kz
717.92200001073
740.18000002252
4700
13889
200
application/x-javascript
Script
https://static.xx.fbcdn.net/rsrc.php/v3/yf/r/DtzWS6Jiyxc.js?_nc_x=Ij3Wp8lg5Kz
718.09700000449
734.16300001554
6786
18754
200
application/x-javascript
Script
https://static.xx.fbcdn.net/rsrc.php/v3iBgZ4/yh/l/en_US/xZZfGtXB8cx.js?_nc_x=Ij3Wp8lg5Kz
718.34000002127
736.08500001137
28651
120824
200
application/x-javascript
Script
https://static.xx.fbcdn.net/rsrc.php/v3/ya/r/nHPEF8fqnVk.js?_nc_x=Ij3Wp8lg5Kz
718.60799999558
747.78900001547
10909
38092
200
application/x-javascript
Script
https://static.xx.fbcdn.net/rsrc.php/v3iFrr4/yN/l/en_US/-MrawDpMvef.js?_nc_x=Ij3Wp8lg5Kz
718.83500000695
735.42400001315
23874
95858
200
application/x-javascript
Script
https://static.xx.fbcdn.net/rsrc.php/v3/yA/r/IOcc7aIQQFV.js?_nc_x=Ij3Wp8lg5Kz
719.06400000444
749.81800001115
25460
88574
200
application/x-javascript
Script
https://static.xx.fbcdn.net/rsrc.php/v3ikDp4/yW/l/en_US/fUug-6-ia8b.js?_nc_x=Ij3Wp8lg5Kz
719.28099999786
742.5729999959
34391
120849
200
application/x-javascript
Script
https://static.xx.fbcdn.net/rsrc.php/v3/yE/r/qDXl2O_TmRT.js?_nc_x=Ij3Wp8lg5Kz
719.54400002141
737.014000013
12132
36908
200
application/x-javascript
Script
https://static.xx.fbcdn.net/rsrc.php/v3/yb/r/J3kuz7CTutE.js?_nc_x=Ij3Wp8lg5Kz
719.76900001755
737.97899999772
16905
62852
200
application/x-javascript
Script
https://static.xx.fbcdn.net/rsrc.php/v3iaIK4/yA/l/en_US/i-OcoHEWeun.js?_nc_x=Ij3Wp8lg5Kz
719.91300000809
739.11100000259
23083
86157
200
application/x-javascript
Script
https://static.xx.fbcdn.net/rsrc.php/v3/yl/r/ukt4CL2riry.js?_nc_x=Ij3Wp8lg5Kz
720.04300000845
738.52500002249
12581
42032
200
application/x-javascript
Script
https://static.xx.fbcdn.net/rsrc.php/v3/yz/r/ntokPrZkT42.js?_nc_x=Ij3Wp8lg5Kz
720.22300001117
739.72500002128
26701
117599
200
application/x-javascript
Script
https://static.xx.fbcdn.net/rsrc.php/v3/yT/r/STtYSd0FVce.js?_nc_x=Ij3Wp8lg5Kz
720.34500000882
736.71300002025
951
380
200
application/x-javascript
Script
https://scontent-mia3-2.xx.fbcdn.net/v/t1.0-0/s526x296/58075_1060851647291166_6656963294095915841_n.png?_nc_cat=109&_nc_sid=dd9801&_nc_oc=AQkwh90pSbbCkum9aVC7-VdLXz6WGRSB0kAiVn9lrlg1xyoNZiETFYv2WRERnDsiy40&_nc_ht=scontent-mia3-2.xx&oh=362adbffcbd0c59e4871dd114f507994&oe=5F18957C
778.27199999592
795.81000001053
83675
83161
200
image/png
Image
https://scontent-mia3-2.xx.fbcdn.net/v/t31.0-1/cp0/p50x50/1015992_1060052094037788_1880061869471150503_o.png?_nc_cat=105&_nc_sid=dbb9e7&_nc_oc=AQn_Vf9HCwLRfJRGVkyd63AsPjhDglDUlToFpQYCR2UWDagwhSgt7HEs3UfUDvaBXbE&_nc_ht=scontent-mia3-2.xx&oh=e017ca78b4bacc101bea4b89b1ac85ab&oe=5F1656E3
781.49900000426
813.57600001502
3118
2606
200
image/png
Image
https://static.xx.fbcdn.net/rsrc.php/v3/yI/r/QzTlY3HW13r.png
880.08400000399
895.45700000599
1951
1378
200
image/png
Image
https://static.xx.fbcdn.net/rsrc.php/v3/ya/r/jNEeuUggdkT.js?_nc_x=Ij3Wp8lg5Kz
921.96300000069
937.76500000968
8218
23392
200
application/x-javascript
Script
https://static.xx.fbcdn.net/rsrc.php/v3/yM/r/R7jW5M-0t-N.js?_nc_x=Ij3Wp8lg5Kz
922.19300000579
942.39800001378
14822
70708
200
application/x-javascript
Script
https://static.xx.fbcdn.net/rsrc.php/v3/ya/r/Mqqf_2Y8blO.js?_nc_x=Ij3Wp8lg5Kz
922.46600001818
941.84600000153
18194
69852
200
application/x-javascript
Script
https://static.xx.fbcdn.net/rsrc.php/v3/yQ/r/iWSXMD6tTj6.js?_nc_x=Ij3Wp8lg5Kz
922.62900000787
942.89200002095
46613
155652
200
application/x-javascript
Script
https://www.facebook.com/pages/call_to_action/fetch_dialog_data/?id=1060052304037767&surface=pagePlugin&unit_type=VIEWER
1007.0640000049
1042.5859999959
1539
1112
200
application/x-javascript
XHR
https://www.facebook.com/platform/plugin/tab/renderer/
1014.4850000215
1193.8709999959
14662
61389
200
application/x-javascript
XHR
https://www.facebook.com/platform/plugin/page/logging/
1016.311000014
1043.2779999974
913
130
200
application/x-javascript
XHR
https://static.xx.fbcdn.net/rsrc.php/v3/yB/r/bSSs0_-Ke1M.png
1021.0620000144
1038.6270000017
11823
11205
200
image/png
Image
https://static.xx.fbcdn.net/rsrc.php/v3/y2/r/onuUJj0tCqE.png
1021.5840000019
1036.7870000191
4517
3944
200
image/png
Image
https://static.xx.fbcdn.net/rsrc.php/v3/yU/l/0,cross/K4TeAw_ETQ8.css?_nc_x=Ij3Wp8lg5Kz
1198.7329999974
1227.1720000135
6028
21853
200
text/css
Stylesheet
1198.4740000044
1198.5250000143
0
1802
200
text/css
Stylesheet
https://static.xx.fbcdn.net/rsrc.php/v3/yc/r/_N0Of8C_kVA.js?_nc_x=Ij3Wp8lg5Kz
1199.4320000231
1215.9990000073
16647
62756
200
application/x-javascript
Script
https://static.xx.fbcdn.net/rsrc.php/v3/yg/r/IWR2aPP6Zji.js?_nc_x=Ij3Wp8lg5Kz
1199.6619999991
1215.2139999962
7790
23151
200
application/x-javascript
Script
https://static.xx.fbcdn.net/rsrc.php/v3iEBX4/yA/l/en_US/wB7paFFzsPW.js?_nc_x=Ij3Wp8lg5Kz
1199.9730000098
1241.8600000092
6511
18247
200
application/x-javascript
Script
https://scontent-mia3-2.xx.fbcdn.net/v/t31.0-1/cp0/p50x50/1015992_1060052094037788_1880061869471150503_o.png?_nc_cat=105&_nc_sid=dbb9e7&_nc_ohc=o5TIee9NVekAX-ge0v3&_nc_ht=scontent-mia3-2.xx&oh=363c9c775a12bd11b4408cf7512e0661&oe=5F1656E3
1291.7190000007
1308.3760000009
3118
2606
200
image/png
Image
https://static.xx.fbcdn.net/rsrc.php/v3/yD/r/HiOkCyc_e9c.png
1295.5730000103
1311.2150000234
4129
3556
200
image/png
Image
https://static.xx.fbcdn.net/rsrc.php/v3/y3/r/n-uOOobFC9i.png
1298.3490000188
1312.820000021
3822
3249
200
image/png
Image
Network Round Trip Times — 0 ms
High Network RTT (Round Trip Times) can have a large impact on performance. Providing servers geographically closer to the user could improve performance.
Server Backend Latencies — 0 ms
High server latencies indicate the server is overloaded or has a poor backend performance.
Tasks
Below is a list of the top-level main thread tasks that executed during page load.
Start Time (Ms) End Time (Ms)
117.684
8.65
184.087
24.209
210.409
9.188
304.12
183.422
500.252
11.77
512.195
21.593
555.62
27.273
583.601
106.11
695.413
10.994
706.918
7.509
718.717
8.872
727.707
8.083
747.196
6.122
760.779
5.306
769.968
9.314
798.664
10.808
813.066
85.776
898.918
20.885
921.638
33.279
970.611
8.708
994.363
55.499
1049.908
9.03
1080.235
5.918
1225.929
6.557
1266.353
5.257
1278.707
44.488
1323.38
35.59
1569.381
16.951
1616.322
5.113
1733.102
5.1
1866.709
5.574
2183.234
5.459
Diagnostics
Below is a collection of useful page vitals.
View Data
Metrics
Below is a collection of metrics.
View Data

Metrics

Speed Index — 5.4 s
The time taken for the page contents to be visibly populated.

Opportunities

Eliminate render-blocking resources — Potential savings of 630 ms
Resources, such as JavaScript and style sheets, can block the first paint of the page. Nctu.me should consider delivering critical JavaScript/style sheets (JS/CSS) inline and deferring all non-critical JS/CSS.
URL Transfer Size (Bytes) Potential Savings (Ms)
https://cdnjs.cloudflare.com/ajax/libs/semantic-ui/2.2.2/semantic.min.css
85752
2130
https://nctu.me/styles.5ed23e0e59190237508c.css
6209
780
Properly size images — Potential savings of 82 KB
Images can slow down the page's load time. Nctu.me should consider serving more appropriate-sized images.
URL Resource Size (Bytes) Potential Savings (Bytes)
https://nctu.me/eb2e4bc216df5a30beb87ed144909e7b.png
84991
84324
Remove unused CSS — Potential savings of 144 KB
Dead and/or unused rules in Style Sheets (CSS) can contribute to network payload sizes. Nctu.me should consider removing dead rules from style sheets and deferring the loading of CSS not used for above-the-fold content.
URL Transfer Size (Bytes) Potential Savings (Bytes)
https://cdnjs.cloudflare.com/ajax/libs/semantic-ui/2.2.2/semantic.min.css
85752
83434
https://static.xx.fbcdn.net/rsrc.php/v3/y6/l/0,cross/i4StkBpywsy.css?_nc_x=Ij3Wp8lg5Kz
64825
63646
Serve images in next-gen formats — Potential savings of 129 KB
Image formats like PNG and JPEG have poor compression when compared to other next-gen formats, such as JPEG 200, JPEG XR and WebP.
URL Resource Size (Bytes) Potential Savings (Bytes)
https://scontent-mia3-2.xx.fbcdn.net/v/t1.0-0/s526x296/58075_1060851647291166_6656963294095915841_n.png?_nc_cat=109&_nc_sid=dd9801&_nc_oc=AQkwh90pSbbCkum9aVC7-VdLXz6WGRSB0kAiVn9lrlg1xyoNZiETFYv2WRERnDsiy40&_nc_ht=scontent-mia3-2.xx&oh=362adbffcbd0c59e4871dd114f507994&oe=5F18957C
83161
73955
https://nctu.me/eb2e4bc216df5a30beb87ed144909e7b.png
84991
58437

Diagnostics

Reduce JavaScript execution time — 2.2 s
JavaScript (JS) execution time can be lowered by reducing the time required for parsing, compiling and executing JS. Delivering smaller JS payloads may help with this.
URL Total CPU Time (Ms) Script Evaluation (Ms) Script Parse (Ms)
https://nctu.me/vendor.5c2f984b61182e384041.js
1320.904
661.68
58.06
https://nctu.me/
950.816
10.96
4.66
https://nctu.me/bundle.fc93147e7a32f0ee20eb.js
699.116
688.444
6.932
https://www.facebook.com/plugins/page.php?href=https%3A%2F%2Fwww.facebook.com%2Fnctu.me.domain&tabs=timeline&width=500&height=300&small_header=false&adapt_container_width=true&hide_cover=false&show_facepile=true&appId
476.756
147.732
34.524
Unattributable
378.58
6.668
0.952
https://static.xx.fbcdn.net/rsrc.php/v3/yb/r/Dv8PLDZc80l.js?_nc_x=Ij3Wp8lg5Kz
342.816
272.556
39.668
https://static.xx.fbcdn.net/rsrc.php/v3/yQ/r/iWSXMD6tTj6.js?_nc_x=Ij3Wp8lg5Kz
256.924
238.98
11.676
https://cdnjs.cloudflare.com/ajax/libs/semantic-ui/2.2.2/semantic.min.css
96.836
0
0

Metrics

First Contentful Paint — 5.4 s
The time taken for the first image or text on the page to be rendered.
Largest Contentful Paint — 6.3 s
The timing of the largest text or image that is painted.
Time to Interactive — 11.7 s
The time taken for the page to become fully interactive.
Total Blocking Time — 830 ms
The total blocking time is the sum of all time periods between First Contentful Paint and Time to Interactive (when task length exceeded 50ms).

Other

First CPU Idle — 11.2 s
The time taken for the page's main thread to be quiet enough to handle input.
Max Potential First Input Delay — 540 ms
Users could experience a delay when interacting with the page.
First Meaningful Paint — 5.6 s
The time taken for the primary content of the page to be rendered.
Estimated Input Latency — 140 ms
The time taken for the page to respond to user input (during the busiest 5 second window of page load). Users are likely to perceive nctu.me as laggy when the latency is higher than 0.05 seconds.
First Contentful Paint (3G) — 11002 ms
The time taken for the first image or text on the page to be rendered while on a 3G network.

Opportunities

Remove unused JavaScript — Potential savings of 503 KB
It is advised to remove unused JavaScript in order to reduce bytes consumed by network activity.
URL Transfer Size (Bytes) Potential Savings (Bytes)
https://nctu.me/vendor.5c2f984b61182e384041.js
297041
143062
https://static.xx.fbcdn.net/rsrc.php/v3/yb/r/Dv8PLDZc80l.js?_nc_x=Ij3Wp8lg5Kz
87090
51914
https://static.xx.fbcdn.net/rsrc.php/v3ikDp4/yW/l/en_US/fUug-6-ia8b.js?_nc_x=Ij3Wp8lg5Kz
34391
32775
https://static.xx.fbcdn.net/rsrc.php/v3/yz/r/ntokPrZkT42.js?_nc_x=Ij3Wp8lg5Kz
26701
24030
https://static.xx.fbcdn.net/rsrc.php/v3iBgZ4/yh/l/en_US/xZZfGtXB8cx.js?_nc_x=Ij3Wp8lg5Kz
28651
23026
https://static.xx.fbcdn.net/rsrc.php/v3/yQ/r/iWSXMD6tTj6.js?_nc_x=Ij3Wp8lg5Kz
46613
21811
https://static.xx.fbcdn.net/rsrc.php/v3iaIK4/yA/l/en_US/i-OcoHEWeun.js?_nc_x=Ij3Wp8lg5Kz
23083
20418
https://static.xx.fbcdn.net/rsrc.php/v3iFrr4/yN/l/en_US/-MrawDpMvef.js?_nc_x=Ij3Wp8lg5Kz
23874
19663
https://static.xx.fbcdn.net/rsrc.php/v3i7M54/yd/l/en_US/W42YOWvE58U.js?_nc_x=Ij3Wp8lg5Kz
29762
19162
https://static.xx.fbcdn.net/rsrc.php/v3/yA/r/IOcc7aIQQFV.js?_nc_x=Ij3Wp8lg5Kz
25460
18685
https://static.xx.fbcdn.net/rsrc.php/v3/ya/r/Mqqf_2Y8blO.js?_nc_x=Ij3Wp8lg5Kz
18194
16930
https://static.xx.fbcdn.net/rsrc.php/v3/yb/r/J3kuz7CTutE.js?_nc_x=Ij3Wp8lg5Kz
16905
15243
https://static.xx.fbcdn.net/rsrc.php/v3/yM/r/R7jW5M-0t-N.js?_nc_x=Ij3Wp8lg5Kz
14822
13901
https://static.xx.fbcdn.net/rsrc.php/v3/yc/r/_N0Of8C_kVA.js?_nc_x=Ij3Wp8lg5Kz
16647
13753
https://static.xx.fbcdn.net/rsrc.php/v3/yl/r/ukt4CL2riry.js?_nc_x=Ij3Wp8lg5Kz
12581
11465
https://static.xx.fbcdn.net/rsrc.php/v3/yE/r/qDXl2O_TmRT.js?_nc_x=Ij3Wp8lg5Kz
12132
10070
https://static.xx.fbcdn.net/rsrc.php/v3/ya/r/nHPEF8fqnVk.js?_nc_x=Ij3Wp8lg5Kz
10909
9816
https://nctu.me/bundle.fc93147e7a32f0ee20eb.js
17758
8020
https://static.xx.fbcdn.net/rsrc.php/v3/yQ/r/4hH0a79Q08s.js?_nc_x=Ij3Wp8lg5Kz
10233
7145
https://www.google-analytics.com/analytics.js
19164
6916
https://static.xx.fbcdn.net/rsrc.php/v3/yg/r/IWR2aPP6Zji.js?_nc_x=Ij3Wp8lg5Kz
7790
6777
https://static.xx.fbcdn.net/rsrc.php/v3/ya/r/jNEeuUggdkT.js?_nc_x=Ij3Wp8lg5Kz
8218
5788
https://static.xx.fbcdn.net/rsrc.php/v3/yN/r/1bZYYvO3P1p.js?_nc_x=Ij3Wp8lg5Kz
5560
4093
https://static.xx.fbcdn.net/rsrc.php/v3iEBX4/yA/l/en_US/wB7paFFzsPW.js?_nc_x=Ij3Wp8lg5Kz
6511
4003
https://static.xx.fbcdn.net/rsrc.php/v3/yf/r/DtzWS6Jiyxc.js?_nc_x=Ij3Wp8lg5Kz
6786
3856
https://static.xx.fbcdn.net/rsrc.php/v3/yr/r/H0NUMBsbxbQ.js?_nc_x=Ij3Wp8lg5Kz
4700
2590

Diagnostics

Minimize main-thread work — 4.9 s
Main-thread work timing can be lowered by reducing the time required for parsing, compiling and executing JS. Delivering smaller JS payloads may help with this.
Category Time Spent (Ms)
Script Evaluation
2155.052
Style & Layout
979.84
Other
686.912
Rendering
382.648
Script Parsing & Compilation
329.216
Parse HTML & CSS
295.212
Garbage Collection
99.768
Ensure text remains visible during webfont load
Make use of the font-display CSS feature, which will ensure text is user-visible while webfonts are loading.
URL Potential Savings (Ms)
https://fonts.gstatic.com/s/lato/v16/S6uyw4BMUTPHjx4wXiWtFCc.woff2
2.5399999867659
https://cdnjs.cloudflare.com/ajax/libs/semantic-ui/2.2.2/themes/default/assets/fonts/icons.woff2
21.191000007093
https://fonts.gstatic.com/s/lato/v16/S6u9w4BMUTPHh6UVSwiPGQ3q5d0.woff2
3.6049999762326
Reduce the impact of third-party code — Third-party code blocked the main thread for 280 ms
It is advised to either limit, remove or delay the loading of redundant third-party code which may be significantly impacting load performance.
Third-Party Transfer Size (Bytes) Main-Thread Blocking Time (Ms)
SHOW DETAILS
748795
250.924
SHOW DETAILS
158449
33.072
SHOW DETAILS
31003
0
SHOW DETAILS
20031
0
SHOW DETAILS
728
0
78

Accessibility

Indicates how accessible the page is and highlights opportunities where the page can be made more accessible to users of nctu.me. This includes details about various page attributes that can be optimized.

Navigation

`[accesskey]` values are unique
Access keys assist users with focusing on different parts of the page. Each access key should be unique for proper navigation.
The page contains a heading, skip link, or landmark region
It is advised to provide ways to bypass repetitive content, allowing users to navigate the page efficiently.
`[id]` attributes on active, focusable elements are unique
Ensure all focusable elements have a unique id value to allow them to be visible to users of assistive technologies, like a screen reader.
No element has a `[tabindex]` value greater than 0
Although technically valid, a tabindex value greater than 0 often creates frustrating experiences for users who rely on assistive technologies.

ARIA

`[aria-*]` attributes match their roles
Avoid mismatching 'aria-*' attributes and their 'role' value, as it invalidates the attribute.
`[aria-hidden="true"]` is not present on the document `<body>`
If aria-hidden=true is set on the document body, assistive technologies, like a screen reader will work inconsistently.
`[aria-hidden="true"]` elements do not contain focusable descendents
Interactive elements within an aria-hidden=true element are unavailable to users of assistive technologies, like a screen reader.
ARIA input fields have accessible names
Generic names are announced to users of assistive technologies, like a screen reader, when an input field does not have an accessible name specified.
`[role]`s have all required `[aria-*]` attributes
Some ARIA roles have required 'aria-*' attributes, which provide essential information about state and functionality.
Elements with an ARIA `[role]` that require children to contain a specific `[role]` have all required children.
Some ARIA parent roles cannot perform their intended functions if specific child roles are not used.
`[role]`s are contained by their required parent element
Some ARIA child roles cannot perform their intended functions if specific parent roles are not used.
`[role]` values are valid
All ARIA roles require valid values to perform their intended functions.
ARIA toggle fields have accessible names
Generic names are announced to users of assistive technologies, like a screen reader, when a toggle field does not have an accessible name specified.
`[aria-*]` attributes have valid values
ARIA attributes cannot be interpreted with invalid values when used by screen readers and other assistive technologies.
`[aria-*]` attributes are valid and not misspelled
ARIA attributes cannot be interpreted with invalid names when used by screen readers and other assistive technologies.
ARIA IDs are unique
Ensure all ARIA ID values are unique to prevent elements from being overlooked by assistive technologies, like a screen reader.

Names and labels

Buttons have an accessible name
Buttons become unusable as they are announced simply as "button" when the button does not have an accessible name, when used by screen readers and other assistive technologies.
Document has a `<title>` element
Search engines, screen reader users and other assistive technology users rely on the title to provide an overview of the page and to help determine if the page is relevant to their search.
No form fields have multiple labels
Having multiple labels for form fields can be confusing to assistive technologies, like a screen reader.
`<input type="image">` elements have `[alt]` text
Input buttons with alternative text assist screen readers and other assistive technology users to understand its purpose.
Form elements have associated labels
Screen readers and other assistive technologies rely on labels to properly announce form controls.
Links have a discernible name
In order to improve the navigation for screen reader and other assistive technology users, use link text that is unique, focusable and discernible.
`<object>` elements have `[alt]` text
It is advised that alt text is used on '<object>' elements in order to provide meaning to screen reader and other assistive technology users, as these technologies are unable to translate non-text content.

Tables and lists

`<dl>`'s contain only properly-ordered `<dt>` and `<dd>` groups, `<script>`, `<template>` or `<div>` elements.
Screen readers and other assistive technologies may produce poor and inaccurate output when definition lists are not properly marked up.
Definition list items are wrapped in `<dl>` elements
In order for screen readers and other assistive technologies to properly announce definition list items ('<dt>' and '<dd>'), they must be wrapped in parent a '<dl>' element.
Presentational `<table>` elements avoid using `<th>`, `<caption>` or the `[summary]` attribute.
It is advised to not include data elements in tables which are used for layout purposes, as it may create confusion for screen reader and other assistive technology users.
Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).
Use proper list structure to aid screen readers and other assistive technologies.
List items (`<li>`) are contained within `<ul>` or `<ol>` parent elements
In order for screen readers to announce list items, ensure that list items ('<li>') are contained within parent '<ul>' or '<ol>' tags.
Cells in a `<table>` element that use the `[headers]` attribute refer to table cells within the same table.
Screen readers and other assistive technologies have features to make navigating tables easier. Ensure that '<td>' cells using the headers attribute only refer to other cells in the same table, to improve screen reader user experience.
`<th>` elements and elements with `[role="columnheader"/"rowheader"]` have data cells they describe.
Screen readers and other assistive technologies have features to make navigating tables easier. Ensure that table headers refer to some set of cells, to improve screen reader user experience.

Internationalization and localization

`<html>` element has a `[lang]` attribute
It is advised to provide a lang attribute so that screen readers and other assistive technologies are guaranteed to announce the page's text correctly. When not provided, the user's default language setting will be used which may cause inaccuracies.
`<html>` element has a valid value for its `[lang]` attribute
Specify a valid BCP 47 language in order to help screen readers and other assistive technologies announce text properly.
`[lang]` attributes have a valid value
Specify a valid BCP 47 language on elements in order to help screen readers and other assistive technologies announce text properly.

Best practices

The document does not use `<meta http-equiv="refresh">`
Pages that refresh automatically cause a poor user experience as focus is directed back to the top of the page unexpectedly.
`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5.
For users with low vision who rely on screen magnification, ensure that zooming is not disabled.

Audio and video

`<video>` elements contain a `<track>` element with `[kind="captions"]`
Nctu.me may provide assistance to deaf or hearing-impaired users with captions on videos.
`<video>` elements contain a `<track>` element with `[kind="description"]`
Nctu.me may provide relevant information that dialogue cannot, by using audio descriptions.

Contrast

Background and foreground colors do not have a sufficient contrast ratio.
Many (if not most) users find low-contrast text difficult or impossible to read.
Failing Elements
NCTU.ME domain Hosting
首頁
聯絡我們
註冊說明
Q & A
登入
Facebook粉絲專頁
Facebook粉絲專頁
聯絡我們
隱私及服務條款
DNSimple Status

Names and labels

`<frame>` or `<iframe>` elements do not have a title
Screen reader users and other assistive technology users rely on frame titles to describe the contents of frames.
Failing Elements
iframe
Image elements do not have `[alt]` attributes
Provide short and descriptive alternative text where possible on informative elements.
Failing Elements
img

Navigation

Heading elements are not in a sequentially-descending order
Properly order all headers and do not skip heading levels to better the navigation and readability for users of assistive technologies, like a screen reader.
Failing Elements
多少人選擇NCTU.ME Domain
按個讚吧！

Manual Checks

The page has a logical tab order
The visual layout should be logical in its tab order and users cannot focus elements that are offscreen.
Interactive controls are keyboard focusable
Ensure that custom interactive controls are keyboard focusable and that a focus indicator is displayed.
Interactive elements indicate their purpose and state
Ensure that interactive elements (such as links and buttons) are distinguishable from non-interactive elements and that they indicate their state.
The user's focus is directed to new content added to the page
When new content (such as a dialogue) is added to the page, the user's focus should be directed to it.
User focus is not accidentally trapped in a region
Avoid focus being accidentally trapped when a user tabs in and out of controls or regions on page.
Custom controls have associated labels
Ensure that custom interactive controls have associated labels, which are provided by aria-label and aria-labelledby attributes.
Custom controls have ARIA roles
Ensure that all custom interactive controls have appropriate ARIA roles.
Visual order on the page follows DOM order
Ensure that the DOM order matches with the page's visual order, in order to improve navigation for screen readers and other assistive technologies.
Offscreen content is hidden from assistive technology
Ensure that offscreen content is hidden through the use of "display:none" styling or the aria-hidden attribute.
HTML5 landmark elements are used to improve navigation
Elements such as <main> and <nav> are recommended as they are used by screen readers and other assistive technologies to improve keyboard navigation.
77

Best Practices

Indicates the recommended, best practices currently in place on the page and highlights the best practices that nctu.me should incorporate. This includes practices such as protecting pages with HTTPS.

Audits

Avoids requesting the geolocation permission on page load
When requesting a user's location, provide context or consider tying the request to a user action to avoid confusion and mistrust from users.
Avoids requesting the notification permission on page load
When requesting permission to send notifications, provide context or consider tying the request to a user action to avoid confusion and mistrust from users.

Audits

Allows users to paste into password fields
Ensure that password inputs may be pasted into to aid in the user's ability to use password managers and improve security.
Displays images with correct aspect ratio
Ensure that image display dimensions match their natural aspect ratio.
Displays images with appropriate size
For maximum image clarity, ensure images have natural dimensions and are proportional to the display size and pixel ratio.

Audits

Page has the HTML doctype
Ensure a doctype is specified to prevent the browser from switching to quirks-mode.
Properly defines charset
It is advised to declare a character encoding, optionally via a <meta> tag in the first 1024 bytes of the HTML or in the Content-Type HTTP response header.

Audits

Avoids Application Cache
Application cache is deprecated and is no longer recommended.
Detected JavaScript libraries
Below is a list of all front-end JavaScript libraries that were detected on the page.
Name Version
React
Lo-Dash
4.17.5
core-js
Avoids deprecated APIs
Avoid deprecated APIs which will eventually be removed the browser.
No browser errors logged to the console
Below is a list of all errors logged to the console, which indicate unresolved problems on the site.

Audits

Does not use HTTPS — 1 insecure request found
Ensure that all pages are protected with HTTPS (including those that do not handle sensitive data) as HTTPS prevents tampering and passive listening on communications between the app and its users. Additionally, HTTPS is a prerequisite for HTTP/2 and many new web platform APIs.
Insecure URL
http://nctu.me/
Links to cross-origin destinations are unsafe
Improve performance and prevent security vulnerabilities by adding rel="noopener" and rel="noreferrer" to external links.
Includes front-end JavaScript libraries with known security vulnerabilities — 4 vulnerabilities detected
Ensure that the use of third-party scripts is minimal and that only trusted third-party scripts are used as some may contain known security vulnerabilities which may be exploited by attackers.
Library Version Vulnerability Count Highest Severity
SHOW DETAILS
4
High
50

SEO

Indicates how well the page is optimized for ranking in search engines and highlights Search Engine Optimization (SEO) opportunities for nctu.me. This includes optimizations such as providing meta data.

Content Best Practices

Document has a `<title>` element
Search engines, screen reader users and other assistive technology users rely on the title to provide an overview of the page and to help determine if the page is relevant to their search.
Links have descriptive text
Make use of descriptive link text to assist search engines in understanding the content.
Document has a valid `hreflang`
Search engines can be instructed to list specific versions of a page for a given language or region through the use of hreflang links.
Document has a valid `rel=canonical`
Search engines can be suggested which URL should be shown in search results through the use of canonical links.
Document avoids plugins
The content of plugins cannot be indexed by search engines and many devices either restrict or do not support them.

Crawling and Indexing

Page has successful HTTP status code
Avoid pages with unsuccessful HTTP status codes as they may not be indexed by search engines.
Page isn’t blocked from indexing
Pages that cannot be crawled by search engines cannot be indexed or included in their search results. Ensure that search engines have permission to crawl all pages that should be indexed.

Mobile Friendly

Does not have a `<meta name="viewport">` tag with `width` or `initial-scale`
It is advised to use a '<meta name="viewport">' tag for the optimization of nctu.me on mobile screens.
Document doesn't use legible font sizes
Font sizes of 12px or less are too small to most mobile users without user gestures and further action. Aim for more than 60% of page text to use font sizes greater than 12px.
Tap targets are not sized appropriately
Interactive elements (such as buttons and links) should be appropriately spaced, sized and easy enough to select or tap with regard to their surrounding elements.

Content Best Practices

Document does not have a meta description
Meta descriptions may be used by search engines when displaying a link to the page and should concisely summarize the page's content.
Image elements do not have `[alt]` attributes
Provide short and descriptive alternative text where possible on informative elements.
Failing Elements
img

Crawling and Indexing

robots.txt is not valid — 3 errors found
Malformed robots.txt files prevent crawlers from understanding how a site wants to be crawled or indexed, which can be devastating to SEO.
Line # Content Error
1
<!DOCTYPE html><html lang=en><head><meta charset=UTF-8><meta property=og:title content="NCTU.me Domain Hosting"><meta property=og:type content=website><meta property=og:url content=https://nctu.me><meta property=og:image content=https://nctu.me/src/static/fb-og.png><meta property=og:site_name content=NCTU.me><meta property=og:description content=一個提供免費網域及交大專屬短網址服務><link rel=stylesheet href=//cdnjs.cloudflare.com/ajax/libs/semantic-ui/2.2.2/semantic.min.css><title>NCTU Domain</title><link rel="shortcut icon" href=favicon-32x32.png><link href=styles.5ed23e0e59190237508c.css rel=stylesheet></head><body><div id=app><div class="ui loader" style="height: 100vh; width: 100vw;"></div></div><script>window.addEventListener("hashchange", function() {
Unknown directive
2
scrollBy(0, -100)
Syntax not understood
3
})</script><script type=text/javascript src=vendor.5c2f984b61182e384041.js></script><script type=text/javascript src=bundle.fc93147e7a32f0ee20eb.js></script></body></html>
Syntax not understood

Manual Checks

Structured data is valid
Structured data can be validated through the use of the Structured Data Testing Tool and the Structured Data Linter.
7

Progressive Web App

Indicates how valid the aspects of a Progressive Web App (PWA) are for the page and highlights opportunities to enable/improve the PWA of nctu.me. This includes details about web app manifests.

PWA Optimized

Redirects HTTP traffic to HTTPS
It is advised to redirect all HTTP traffic to HTTPS, in order to enable secure web features for all users.

Fast and reliable

Page load is not fast enough on mobile networks — Interactive at 11.7 s
Ensure that the page loads fast enough over a cellular network, to ensure good mobile user experience.
Current page does not respond with a 200 when offline
In order for Progressive Web Apps to be made available offline, ensure that the app is using a service worker.
`start_url` does not respond with a 200 when offline
Consider using a service worker for Progressive Web Apps to ensure greater reliability for the user, in the case of poor network conditions.

Installable

Does not use HTTPS — 1 insecure request found
Ensure that all pages are protected with HTTPS (including those that do not handle sensitive data) as HTTPS prevents tampering and passive listening on communications between the app and its users. Additionally, HTTPS is a prerequisite for HTTP/2 and many new web platform APIs.
Insecure URL
http://nctu.me/
Does not register a service worker that controls page and `start_url`
A service worker is used to provide Progressive Web Apps the use of features such as working offline, the ability for the app to be added to the homescreen as well as push notifications.
Web app manifest does not meet the installability requirements
User engagement may be increased by leveraging the browsers ability to proactively prompt users to add the app to their homescreen.
View Data

PWA Optimized

Is not configured for a custom splash screen
Themed splash screens ensure a high-quality user experience at launch for app users.
View Data
Does not set a theme color for the address bar.
A theme may be applied to the browser address bar, which ideally can be made to match the site.
View Data
Content is not sized correctly for the viewport
Ensure that the width of the app's content matches the width of the viewport, otherwise the app might not be optimized for mobile screens.
Does not have a `<meta name="viewport">` tag with `width` or `initial-scale`
It is advised to use a '<meta name="viewport">' tag for the optimization of nctu.me on mobile screens.
Does not provide fallback content when JavaScript is not available
Apps should display alternative content for when JavaScript is disabled.
Does not provide a valid `apple-touch-icon`
iOS users of Progressive Web Apps will benefit from an apple touch icon, which can be defined with 'apple-touch-icon', which must point to a non-transparent 192px (or 180px) square PNG.
Manifest doesn't have a maskable icon
Maskable icons are great to ensure that images fill the entire shape when installing the app on a device.

Manual Checks

Site works cross-browser
Ensure that the Progressive Web App works correctly across every major browser.
Page transitions don't feel like they block on the network
Users perceive apps with responsive, snappy transitions as higher peforming and ensures a great user experience, even on a slow network.
Each page has a URL
Ensure that all pages are deep linkable via URL. They should also be unique for the purpose of shareability on social media.
Hosting

Server Location

Server IP Address: 52.14.165.111
Continent: North America
Country: United States
United States Flag
Region: Ohio
City: Columbus
Longitude: -83.0235
Latitude: 39.9653
Currencies: USD
USN
USS
Languages: English

Web Hosting Provider

Name IP Address
Amazon Technologies Inc.
Registration

Domain Registrant

Private Registration: No
Name:
Organization:
Country:
City:
State:
Post Code:
Email:
Phone:
Note: Registration information is derived from various sources and may be inaccurate.

Domain Registrar

Security

Visitor Safety

Mature Content: Not Likely
McAfee WebAdvisor Rating:
WOT Rating:
WOT Trustworthiness:
WOT Child Safety:
Note: Safety information is not guaranteed.

SSL/TLS Certificate

Issued To: nctu.me
Issued By: Let's Encrypt Authority X3
Valid From: 30th May, 2020
Valid To: 28th August, 2020
Subject: CN = nctu.me
Hash: 5cec6313
Issuer: CN = Let's Encrypt Authority X3
O = Let's Encrypt
S = US
Version: 2
Serial Number: 0x044DFD5123941E0F09BD7D135894F3BD1CE0
Serial Number (Hex): 044DFD5123941E0F09BD7D135894F3BD1CE0
Valid From: 30th May, 2024
Valid To: 28th August, 2024
Signature Algorithm (Short Name): RSA-SHA256
Signature Algorithm (Long Name): sha256WithRSAEncryption
Authority Key Identifier: keyid:A8:4A:6A:63:04:7D:DD:BA:E6:D1:39:B7:A6:45:65:EF:F3:A8:EC:A1
Extended Key Usage: TLS Web Server Authentication, TLS Web Client Authentication
Certificate Policies: Policy: 2.23.140.1.2.1
Policy: 1.3.6.1.4.1.44947.1.1.1
CPS: http://cps.letsencrypt.org
Authority Information Access: OCSP - URI:http://ocsp.int-x3.letsencrypt.org
CA Issuers - URI:http://cert.int-x3.letsencrypt.org/
SCT List: Signed Certificate Timestamp:
Version : v1 (0x0)
Log ID : 5E:A7:73:F9:DF:56:C0:E7:B5:36:48:7D:D0:49:E0:32:
7A:91:9A:0C:84:A1:12:12:84:18:75:96:81:71:45:58
Timestamp : May 30 13:06:27.191 2020 GMT
Extensions: none
Signature : ecdsa-with-SHA256
30:45:02:20:17:32:D9:59:82:A2:A0:42:07:58:4E:8B:
4F:75:5F:48:CD:DE:57:C0:A3:B4:F4:69:E6:FB:ED:64:
CD:9C:B2:C0:02:21:00:F9:0B:EF:CE:B3:2C:BE:50:61:
B8:F9:75:F6:7C:9B:60:73:6A:E7:41:1A:E1:76:C7:B2:
36:06:FF:51:7B:90:C8
Signed Certificate Timestamp:
Version : v1 (0x0)
Log ID : 07:B7:5C:1B:E5:7D:68:FF:F1:B0:C6:1D:23:15:C7:BA:
E6:57:7C:57:94:B7:6A:EE:BC:61:3A:1A:69:D3:A2:1C
Timestamp : May 30 13:06:27.246 2020 GMT
Extensions: none
Signature : ecdsa-with-SHA256
30:46:02:21:00:DD:35:CF:AE:6E:DD:D4:A2:3A:B9:40:
82:E9:3B:B2:89:FF:7A:D6:D2:35:12:85:6D:75:1C:25:
3D:BB:42:BF:53:02:21:00:A7:FE:85:D7:B8:1A:3E:44:
D0:23:9A:46:72:8C:45:D5:C9:0B:94:A6:67:53:33:31:
02:EE:8A:27:86:F9:D2:AB
Key Usage: Digital Signature, Key Encipherment
Basic Constraints: CA:FALSE
Subject Alternative Name: DNS:id.nctu.me
DNS:nctu.me
DNS:api.nctu.me
Technical

DNS Lookup

A Records

Host IP Address Class TTL
nctu.me. 52.14.165.111 IN 3599

NS Records

Host Nameserver Class TTL
nctu.me. ns1.dnsimple.com. IN 3599
nctu.me. ns2.dnsimple.com. IN 3599
nctu.me. ns3.dnsimple.com. IN 3599
nctu.me. ns4.dnsimple.com. IN 3599

MX Records

Priority Host Server Class TTL
10 nctu.me. mx1.improvmx.com. IN 3599
20 nctu.me. mx2.improvmx.com. IN 3599

SOA Records

Domain Name Primary NS Responsible Email TTL
nctu.me. ns1.dnsimple.com. admin.dnsimple.com. 3599

HTTP Response Headers

HTTP-Code: HTTP/1.1 200 OK
Server: nginx/1.14.0 (Ubuntu)
Date: 23rd June, 2020
Content-Type: text/html
Expires: 23rd June, 2020
Cache-Control: no-cache
Content-Length: 1003
Last-Modified: 7th March, 2020
Connection: keep-alive
Vary: Accept-Encoding
ETag: "5e636d11-3eb"
Accept-Ranges: bytes

Whois Lookup

Created: 4th September, 2015
Changed: 19th June, 2020
Expires: 4th September, 2021
Registrar: Porkbun LLC
Status: clientDeleteProhibited
clientTransferProhibited
Nameservers: ns1.dnsimple.com
ns2.dnsimple.com
ns3.dnsimple.com
ns4.dnsimple.com
Owner Organization: Private by Design, LLC
Owner State: NC
Owner Country: US
Full Whois: Domain Name: NCTU.ME
Registry Domain ID: D108500000015718126-AGRS
Registrar WHOIS Server:
Registrar URL:
Updated Date: 2020-06-19T07:08:05Z
Creation Date: 2015-04-09T17:29:20Z
Registry Expiry Date: 2021-04-09T17:29:20Z
Registrar Registration Expiration Date:
Registrar: Porkbun LLC
Registrar IANA ID: 1861
Registrar Abuse Contact Email:
Registrar Abuse Contact Phone:
Reseller:
Domain Status: clientDeleteProhibited https://icann.org/epp#clientDeleteProhibited
Domain Status: clientTransferProhibited https://icann.org/epp#clientTransferProhibited
Registrant Organization: Private by Design, LLC
Registrant State/Province: NC
Registrant Country: US
Name Server: NS3.DNSIMPLE.COM
Name Server: NS2.DNSIMPLE.COM
Name Server: NS1.DNSIMPLE.COM
Name Server: NS4.DNSIMPLE.COM
DNSSEC: unsigned
URL of the ICANN Whois Inaccuracy Complaint Form https://www.icann.org/wicf/)
>>> Last update of WHOIS database: 2020-06-23T07:44:00Z <<<

For more information on Whois status codes, please visit https://icann.org/epp

Access to WHOIS information is provided to assist persons in determining the contents of a domain name registration record in the registry database. The data in this record is provided by The Registry Operator for informational purposes only, and accuracy is not guaranteed. This service is intended only for query-based access. You agree that you will use this data only for lawful purposes and that, under no circumstances will you use this data to (a) allow, enable, or otherwise support the transmission by e-mail, telephone, or facsimile of mass unsolicited, commercial advertising or solicitations to entities other than the data recipient's own existing customers; or (b) enable high volume, automated, electronic processes that send queries or data to the systems of Registry Operator, a Registrar, or Afilias except as reasonably necessary to register domain names or modify existing registrations. All rights reserved. Registry Operator reserves the right to modify these terms at any time. By submitting this query, you agree to abide by this policy.
The Registrar of Record identified in this output may have an RDDS service that can be queried for additional information on how to contact the Registrant, Admin, or Tech contact of the queried domain name.
View Raw Whois

Nameservers

Name IP Address
ns1.dnsimple.com 162.159.24.4
ns2.dnsimple.com 199.247.153.53
ns3.dnsimple.com 162.159.26.4
ns4.dnsimple.com 199.247.155.53
Related

Subdomains

Domain Subdomain
son.nctu.me
son
spm.nctu.me
spm

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Domain Valuation Snoop Score
nctu.edu.tw
$234,296 USD 3/5
nctu.info
0/5

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