184417 2018-04-09 07:37:03 -0700 CSS: filter should reject negative brightness 2018-04-25 17:59:09 -0700 1 1 1 Unclassified WebKit CSS Safari 11 Unspecified Unspecified RESOLVED DUPLICATE 184937 FromImplementor, InRadar P2 Normal --- 1 ericwilligers webkit-unassigned dino simon.fraser webkit-bug-importer oldest_to_newest 1412868 0 ericwilligers 2018-04-09 07:37:03 -0700 https://drafts.fxtf.org/filter-effects/#FilterProperty brightness() = brightness( <number-percentage> ) Negative values are not allowed. However, WebKit and Blink currently accept negative values. https://jsfiddle.net/ericwilligers/y4j8hzvs/ Corresponding Blink bug: https://bugs.chromium.org/p/chromium/issues/detail?id=776208 1414135 1 webkit-bug-importer 2018-04-12 12:26:05 -0700 <rdar://problem/39389946> 1417924 2 simon.fraser 2018-04-25 17:59:09 -0700 Fixed via bug 184937. *** This bug has been marked as a duplicate of bug 184937 ***