2.4 sec in total
161 ms
2.1 sec
193 ms
Visit learn-js.org now to see the best up-to-date Learn Js content for United States and also check out these interesting facts you probably never knew about learn-js.org
learn-js.org is a free interactive JavaScript tutorial for people who want to learn JavaScript, fast.
Visit learn-js.orgWe analyzed Learn-js.org page load time and found that the first response time was 161 ms and then it took 2.3 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 40% of websites can load faster.
learn-js.org performance score
name
value
score
weighting
Value1.4 s
97/100
10%
Value2.0 s
97/100
25%
Value6.1 s
45/100
10%
Value3,330 ms
2/100
30%
Value0.419
23/100
15%
Value11.1 s
20/100
10%
161 ms
34 ms
73 ms
62 ms
73 ms
Our browser made a total of 118 requests to load all elements on the main page. We found that 21% of them (25 requests) were addressed to the original Learn-js.org, 9% (11 requests) were made to Us-u.openx.net and 6% (7 requests) were made to Apis.google.com. The less responsive or slowest element that took the longest time to load (697 ms) relates to the external source Spoj.com.
Page size can be reduced by 864.3 kB (63%)
1.4 MB
499.1 kB
In fact, the total size of Learn-js.org main page is 1.4 MB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 70% of websites need less resources to load. Javascripts take 1.2 MB which makes up the majority of the site volume.
Potential reduce by 60.3 kB
HTML content can be minified and compressed by a website’s server. The most efficient way is to compress content using GZIP which reduces data amount travelling through the network between server and browser. HTML code on this page is well minified. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 60.3 kB or 73% of the original size.
Potential reduce by 7.3 kB
Image size optimization can help to speed up a website loading time. The chart above shows the difference between the size before and after optimization. Learn Js images are well optimized though.
Potential reduce by 796.7 kB
It’s better to minify JavaScript in order to improve website performance. The diagram shows the current total size of all JavaScript files against the prospective JavaScript size after its minification and compression. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 796.7 kB or 68% of the original size.
Number of requests can be reduced by 76 (70%)
109
33
The browser has sent 109 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Learn Js. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 46 to 1 for JavaScripts and from 5 to 1 for CSS and as a result speed up the page load time.
learn-js.org
161 ms
codemirror.css
34 ms
monokai.css
73 ms
bootstrap.min.css
62 ms
bootstrap-responsive.css
73 ms
learnpython.css
621 ms
jquery.min.js
152 ms
addthis_widget.js
15 ms
show_ads.js
15 ms
banner.js
697 ms
fpi.js
23 ms
codemirror.js
85 ms
matchbrackets.js
78 ms
clike.js
82 ms
python.js
87 ms
perl.js
169 ms
php.js
266 ms
javascript.js
141 ms
ruby.js
132 ms
shell.js
146 ms
bootstrap.min.js
173 ms
bootbox.min.js
186 ms
learnpython.js
163 ms
getheadertagforsite
67 ms
learn-js.png
68 ms
en.png
86 ms
digital-ocean.png
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dmca_protected_sml_120ad.png
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ca-pub-3723950136133694.js
30 ms
zrt_lookup.html
121 ms
show_ads_impl.js
121 ms
sync
90 ms
glyphicons-halflings-white.png
149 ms
se-logo-anim.gif
149 ms
analytics.js
128 ms
300lo.json
166 ms
all.js&version=v2.0
576 ms
widgets.js
158 ms
plusone.js
155 ms
counter.e06ccbeb85753d56d6a9.js
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adcfg
80 ms
ads
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gpt.js
102 ms
sh.7c7179124ea24ac6ba46caac.html
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osd.js
99 ms
collect
183 ms
addelivery
242 ms
ads
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shares.json
137 ms
cb=gapi.loaded_0
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cb=gapi.loaded_1
194 ms
fastbutton
451 ms
button.831500944bc3eb7ea5276ccdc3f71d2e.js
193 ms
pubads_impl_81.js
48 ms
ads
251 ms
container.html
27 ms
pixel
31 ms
pixel
31 ms
pixel
30 ms
match-result
31 ms
match-result
32 ms
match-result
26 ms
jstag
32 ms
1
90 ms
postmessageRelay
110 ms
acj
364 ms
pixel
65 ms
s_0Re36KCtSs_194689081.html
158 ms
pixel
77 ms
tweet_button.6a78875565a912489e9aef879c881358.en.html
100 ms
11929481168919359006
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abg.js
201 ms
m_js_controller.js
258 ms
googlelogo_color_112x36dp.png
232 ms
api.js
146 ms
core:rpc:shindig.random:shindig.sha1.js
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2536007149-postmessagerelay.js
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a.js;p=11177200956839;a=11177200932861;cache=1643151066632916
184 ms
creative_add_on.js
285 ms
198 ms
cb=gapi.loaded_0
78 ms
cb=gapi.loaded_1
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xd_arbiter.php
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xd_arbiter.php
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W5F8_SL0XFawnjxHGsZjJA.ttf
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s
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redir.html
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x_button_blue2.png
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PAPlus_OliviaMunn_FSH_728x90.jpg
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pd
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pb.js
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rr
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ri
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jot
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adchoices.png
183 ms
1
43 ms
acj
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786fb4ee-9224-df1b-23d1-2ae05cc84972
82 ms
openx
72 ms
pixel
72 ms
iframe.html
60 ms
E4WYPs_lNJIuXrWpTsOcc3FIG36RfI0ERc0srw5QW9Y.js
22 ms
openx
18 ms
sd
14 ms
sd
8 ms
sd
4 ms
sd
7 ms
sd
4 ms
pd
12 ms
1
23 ms
rr
12 ms
ri
11 ms
OpenX.ashx
68 ms
cfcm.ashx
10 ms
sd
7 ms
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learn-js.org accessibility score
ARIA
These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.
Impact
Issue
[aria-*] attributes do not match their roles
Names and labels
These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.
Impact
Issue
Buttons do not have an accessible name
<frame> or <iframe> elements do not have a title
Image elements do not have [alt] attributes
Contrast
These are opportunities to improve the legibility of your content.
Impact
Issue
Background and foreground colors do not have a sufficient contrast ratio.
Navigation
These are opportunities to improve keyboard navigation in your application.
Impact
Issue
Heading elements are not in a sequentially-descending order
learn-js.org best practices score
Trust and Safety
Impact
Issue
Does not use HTTPS
Includes front-end JavaScript libraries with known security vulnerabilities
Ensure CSP is effective against XSS attacks
General
Impact
Issue
Detected JavaScript libraries
Page has valid source maps
learn-js.org SEO score
Content Best Practices
Format your HTML in a way that enables crawlers to better understand your app’s content.
Impact
Issue
Links do not have descriptive text
Image elements do not have [alt] attributes
Mobile Friendly
Make sure your pages are mobile friendly so users don’t have to pinch or zoom in order to read the content pages. [Learn more](https://developers.google.com/search/mobile-sites/).
Impact
Issue
Document uses legible font sizes
Tap targets are not sized appropriately
EN
N/A
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Learn-js.org can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and neither this language nor any other was claimed in <html> or <meta> tags. Our system also found out that Learn-js.org main page’s claimed encoding is utf-8. Use of this encoding format is the best practice as the main page visitors from all over the world won’t have any issues with symbol transcription.
learn-js.org
Open Graph description is not detected on the main page of Learn Js. Lack of Open Graph description can be counter-productive for their social media presence, as such a description allows converting a website homepage (or other pages) into good-looking, rich and well-structured posts, when it is being shared on Facebook and other social media. For example, adding the following code snippet into HTML <head> tag will help to represent this web page correctly in social networks: