# JavaScript Library Detection **URL:** \ **Category:** Analysis\ **Created:** [May 2, 2017, 9:19pm UTC](https://discuss.httparchive.org/t/javascript-library-detection/955 "2017-05-02T21:19:29Z")\ **Posts on this page:** 1\ **Showing post:** 2
**Author:** ![rviscomi](https://yyz1.discourse-cdn.com/flex035/user_avatar/discuss.httparchive.org/rviscomi/32/835_2.png) [@rviscomi](https://discuss.httparchive.org/u/rviscomi)\ **Post date:** [May 10, 2017, 9:49pm UTC](https://discuss.httparchive.org/t/javascript-library-detection/955/2 "2017-05-10T21:49:22Z")
Let’s dig deeper into the JS library data and try to answer some common questions. I’ll be adding to this thread with different analyses. First up… ## What are the most popular libraries? ```sql SELECT library.value AS library, library.count AS volume, ROUND(library.count / total.count, 3) AS coverage FROM UNNEST((SELECT APPROX_TOP_COUNT(lib.name, 10) FROM `httparchive.scratchspace.2017_04_15_js_libs` WHERE lib.name IS NOT NULL)) AS library, (SELECT COUNT(0) AS count FROM `httparchive.har.2017_04_15_chrome_pages`) AS total ORDER BY volume DESC ``` ``` Row library volume coverage 1 jQuery 394296 0.822 2 jQuery UI 104193 0.217 3 Modernizr 76339 0.159 4 Bootstrap 61711 0.129 5 yepnope 54589 0.114 6 FlexSlider 39465 0.082 7 SWFObject 23054 0.048 8 Underscore 19283 0.04 9 Google Maps 16091 0.034 10 Moment.js 14834 0.031 ``` [Run it on BigQuery](https://bigquery.cloud.google.com/savedquery/226352634162:c19b06262b0c4ca39ecd6b0d5123f45e) Querying for the top 10 libraries shows that jQuery is way out ahead and jQuery UI leads the race behind it. [![](https://canada1.discourse-cdn.com/flex035/uploads/httparchive/original/1X/8d2b2eed4c9647cb666a940dcea4d22fa442ed75.png)](http://jsfiddle.net/8e5uobnb/4/) [http://jsfiddle.net/8e5uobnb/4/](http://jsfiddle.net/8e5uobnb/4/) Getting more than the top 10 is as easy as changing the `APPROX_TOP_COUNT` arguments. But because jQuery has so much coverage, plotting everything linearly makes the smaller libraries’ data impossible to read. [![](https://canada1.discourse-cdn.com/flex035/uploads/httparchive/original/1X/1c79d9f06f267530c6c8e5e248882fe01ee386d2.png)](http://jsfiddle.net/8e5uobnb/5/) [http://jsfiddle.net/8e5uobnb/5/](http://jsfiddle.net/8e5uobnb/5/) Plotting the entire data in a logarithmically-scaled chart reveals the long tail. --- _[View the full topic](https://discuss.httparchive.org/t/javascript-library-detection/955)._