<!DOCTYPE html> <link rel="help" href="https://drafts.css-houdini.org/css-properties-values-api-1"> <script src="/resources/testharness.js"></script> <script src="/resources/testharnessreport.js"></script> <script src="../resources/utils.js"></script> <div id="target"></div> <script> no_transition_test({ syntax: "<url>", from: 'url("https://example.com/from")', to: 'url("https://example.com/to")', }, 'A custom property of type <url> cannot yield a CSS Transition'); </script>