| <!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> |
| |
| test(() => { |
| const customProperty = "--my-length"; |
| |
| CSS.registerProperty({ |
| name: customProperty, |
| syntax: "<length>", |
| inherits: false, |
| initialValue: "100px" |
| }); |
| |
| target.style.marginLeft = `var(${customProperty})`; |
| assert_equals(getComputedStyle(target).marginLeft, "100px"); |
| |
| target.style.transition = `${customProperty} 1s -500ms linear`; |
| target.style.setProperty(customProperty, "200px"); |
| |
| assert_equals(getComputedStyle(target).marginLeft, "150px"); |
| }, "Running a transition a non-inherited CSS variable is reflected on a standard property using that variable as a value"); |
| |
| </script> |
