Change record status: 
Project: 
Introduced in branch: 
8.7.x
Description: 

Drupal dropped support for IE 9 and 10 in 8.4.0.

In Internet Explorer 9 and earlier, there is a limit of 31 style sheets per page. Drupal 8.6 and earlier included a workaround for this limitation by rendering using groups of inline @import statements instead of individual <link> elements when 32 or more stylesheets were added to a page.

Production sites should enable CSS aggregation to reduce the number of stylesheets included on each page.

The IE9 Compatibility contrib module maintains support for this workaround.

Impacts: 
Site builders, administrators, editors