jQuery.fn.attr('checked') may use property instead of attribute
Cause: Prior to jQuery 1.9, $().attr("checked") etc. would sometimes use the checked|selected property instead of the attribute when interacting with non-XML elements, despite the fact that browsers and the HTML specifications allow the properties (current state) to differ from the attributes (initial/default state). This was a holdover from earlier versions of jQuery that did not offer $().prop.
Solution: Boolean properties should generally not be passed to $().attr at all; replace with $().prop unless you truly intend to update the underlying HTML attribute.
Since .prop is only supported with jquery >= 1.9, I used vanillaJS in a patch instead.
Closed: outdated
3.0
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It's likely this issue predates Contrib.social: some issue and comment data are missing.
Given the proximity of EOL for Drupal 7, marking this as won't fix. The likely final Drupal 7 release of diff has landed in https://www.drupal.org/project/diff/releases/7.x-3.5 → . If this is something still applicable to a more modern version of the module, feel free to re-open and post additional notes.