Description
In jQuery 3.6.0, $element.css("--custom") correctly returned undefined for a custom property that isn’t set. But in jQuery 3.6.1, it crashes with TypeError: ret is undefined.
This breaks the Zulip settings dialog.
This was presumably introduced by #4930 (cc @fecore1 @mgol).
Link to test case
https://codepen.io/anderskaseorg/pen/rNvNZWW
Description
In jQuery 3.6.0,
$element.css("--custom")correctly returnedundefinedfor a custom property that isn’t set. But in jQuery 3.6.1, it crashes withTypeError: ret is undefined.This breaks the Zulip settings dialog.
This was presumably introduced by #4930 (cc @fecore1 @mgol).
Link to test case
https://codepen.io/anderskaseorg/pen/rNvNZWW