Expect: Clicking the indicated element updates its `toggle` attribute, which should in turn apply a style rule changing the background color. This works as expected in Chrome.
Actual: Clicking the element updates the attribute, but not the style. Using the inspector to manually disable the rule for `background` and re-enable it causes the rule to be applied as expected.
We've encountered various flavors of this bug before: https://bugs.webkit.org/show_bug.cgi?id=112869 and https://bugs.webkit.org/show_bug.cgi?id=158900.
Created attachment 309447 [details]
Adding the repro case as an attachment, as jsbin.com seems to be down/flaky.
*** This bug has been marked as a duplicate of bug 170762 ***