<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>grid-template-columns neutral keyframe</title> <link rel="help" href="https://drafts.csswg.org/css-grid/#track-sizing"> <meta name="assert" content="grid-template-columns supports neutral keyframe."> <script src="/resources/testharness.js"></script> <script src="/resources/testharnessreport.js"></script> <script src="/css/support/interpolation-testcommon.js"></script> </head> <body> <div id="target"></div> <script> test(() => { target.style.gridTemplateColumns = '200px'; var animation = target.animate([{}, {gridTemplateColumns: '30px 300px'}], 1000); animation.pause(); animation.currentTime = 500; assert_equals(getComputedStyle(target).gridTemplateColumns, '30px 300px'); target.style.gridTemplateColumns = '20px 200px'; assert_equals(getComputedStyle(target).gridTemplateColumns, '25px 250px'); target.style.gridTemplateColumns = '200px'; assert_equals(getComputedStyle(target).gridTemplateColumns, '30px 300px'); }, 'Invalidate the result for the neutral keyframe if the size of the list changes.'); </script> </body> </html>