By partyka on
Change record status: 
Published (View all published change records)
Project: 
Drupal core
Introduced in branch: 
9.1.x
Introduced in version: 
9.1.0
Issue links: 
https://www.drupal.org/node/2991219
Description: 

File link attributes contained microdata that did not comply with the HTML spec. Prior to this change, the length/file size of the file was appended to the link, but this is not a valid attribute to be set.

From the w3c HTML 5 working draft for web authors

The type attribute, if present, gives the MIME type of the linked resource. It is purely advisory. The value must be a valid MIME type.

After this change, the length/filesize attribute is no longer part of the HTML output.

Example:

Before change:

<a href="https://www.example.com/sites/default/files/2020-07/textfile.txt" type="text/plain; length=4671">a text file</a>

After change:

<a href="https://www.example.com/sites/default/files/2020-07/textfile.txt" type="text/plain">a text file</a>
Impacts: 
Module developers
Themers