143327 2015-04-01 18:30:45 -0700 No-op inline style changes cause style recalcs 2022-07-14 13:45:45 -0700 1 1 1 Unclassified WebKit CSS 528+ (Nightly build) Unspecified Unspecified RESOLVED CONFIGURATION CHANGED P2 Normal --- 1 esprehn webkit-unassigned bfulgham kling koivisto oldest_to_newest 1082157 0 esprehn 2015-04-01 18:30:45 -0700 Confirmed in r182227 <div id="test"></div> <script> var test = document.getElementById("test"); setInterval(function() { test.style.top = "0px"; }); </script> This causes an infinite number of style recalcs even though it's just assigning the same number repeatedly. It seems the parser returns true to mean "successfully parsed", and the inline style machinery interprets that bool to mean "something changed". Probably want to compare the CSSProperty objects to see that they're actually different instead (different value, different important). 1883761 1 bfulgham 2022-07-14 13:45:45 -0700 This doesn't seem to be an issue in Safari 15.5+. I only see the initial style and layout, then the timer running with no further style recalls.