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HTML, CSS, and JavaScript code that was only in place to support Internet Explorer 6, Internet Explorer 7 and Internet Explorer 8 has been or will be removed from Drupal 8 core.

Usage statistics for IE6, IE7 and IE8 continue to drop (statcounter, sitepoint, w3counter, theie7countdown) and are forecast to be even lower when Drupal 8 is released.

Removing full front-end support for IE6, IE7 and IE8 also has many benefits:

  • Allows for more complex and/or efficient CSS and JavaScript to be written e.g. IE7 does not meet ACID2 test.
  • Many features are not available to IE8 and under: IE 6,7,8,9
  • Reduces the amount of code delivered to browsers on each request, potentially improving performance in all browsers e.g. html5please. Core now ships with jQuery 2
  • Frees up time previously spent developing and testing IE6 and IE7 fixes, allowing core developers and contributors to work on other tasks.

A module or theme can add back IE6 or IE7 compatibility if desired, but core will no longer offer any specific IE6 or IE7 front-end fixes (CSS and JavaScript). Some code supporting these browsers still remains in core (e.g. Form API) to ensure basic functionality.

The change to HTML5 markup in Drupal 8 also includes the adoption of the HTML5shiv JavaScript library which allows the use of HTML5 elements in IE8 and below.

JavaScript can break in IE6/7/8 and core does not take special measures to avoid it.

IE8 support is more important than IE6 and IE7. As such, core will still provide HTML5shiv to allow CSS to be applied to new elements on IE8 and under. For users needing IE8 support in Drupal 8 an unofficial IE8 module is available.

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Coder Upgrade: 
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Other updates done