Javascript’s jQuery 1.9 and 2: ending support for old Internet Explorer 6, 7, and 8

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On November 13, 2012, the developers at Yeti attended the Web Performance SF meetup in San Francisco. This meetup briefly introduced jQuery 1.9 and 2, a core library to building any web application. jQuery is a library that accesses a web page’s Domain Object Model (DOM), which include the text, graphics, and layout of a webpage’s content. One of the core developers of the jQuery Javascript library was in attendance, who participated on the W3C panel for the Javascript standard. Key points he mentioned:

  • jQuery 2 will no longer support old Internet Explorer 6, 7, and 8, which will make the library significantly faster to run for web applications. Internet Explorer 9, since it is rewritten to support modern web standards, will be supported.
  • jQuery 1.9 will be feature-compatible (i.e., API compatible) with jQuery 2 and support old Internet Explorer 6, 7, and 8. It will be significantly slower because it provides workarounds for problems in old Internet Explorer.
  • Web developers will include a HTML conditional comment to swap between using jQuery 1.9 for old Internet Explorer and jQuery 2 for modern web browsers, including Chrome, Firefox, Safari, and IE 9.

For more information about the recent developments of jQuery, refer to: