gecko-dev/layout/reftests/css-animations/change-animation-name-in-rule-ref.html

<!DOCTYPE html>
<html>
<style>
div {
  background-color: green;
  width: 100px;
  height: 100px;
}
</style>
<div></div>
Bug 1392851 - Try to update running CSS animations when CSS rules are changed. r=birtles In the case where values in CSS rules changed directly by CSSOM, the old value in the CSS rule block is immediately replaced by the new one. So if the element, which is applied to the CSS rule, has running animations, the new value is used during cascading process in animation-only restyle. Thus in a subsequent normal restyle, we can't tell whether the value in the CSS rule has changed or not. As a result, transitions may not be triggered (bug 1393323) and CSS animations may not be cancelled if the updated animation-name is 'none' (this bug). For the latter case of CSS animations where animation-name has been updated to 'none', this patch introduces a workaround whereby we trigger an update of running animations whenever the traversal is triggered by changes to CSS rules and we have existing CSS animations. change-animation-name-to-none-in-rule.html fails without servo #18214, succeeds with this patch. Other two tests succeed regardless of the PR. MozReview-Commit-ID: BrZgTNk9w41 --HG-- extra : rebase_source : 7a55f54a0f94c8db02639f9d8c89f785b3a17a1b 2017-08-24 09:27:10 +00:00			`<!DOCTYPE html>`
			`<html>`
			`<style>`
			`div {`
			`background-color: green;`
			`width: 100px;`
			`height: 100px;`
			`}`
			`</style>`
			`<div></div>`