if-media-invalidation.html

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This test has a WPT meta file that expects 1 subtest issues.
This WPT test may be referenced by the following Test IDs:
- /css/css-values/if-media-invalidation.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<title>CSS Values and Units Test: if() media() condition invalidation</title>

<meta name="assert" content="Test if() media() condition invalidation">

<link rel="help" href="https://drafts.csswg.org/css-values-5/#if-notation">

<script src="/resources/testharness.js"></script>

<script src="/resources/testharnessreport.js"></script>

<style>

  iframe {

    width: 50px;

    height: 50px;

</style>

<iframe id="iframe" srcdoc="

  <div id=target></div>

  <style>

    #target {

      --actual: if(media((height < 100px) or ((height >= 200px) and (height < 300px))): true_value; else: false_value;);

  </style>

"></iframe>

<script>

  function waitForLoad(w) {

    return new Promise(resolve => w.addEventListener('load', resolve));

  promise_test(async () => {

    await waitForLoad(window);

    const target = iframe.contentDocument.querySelector('#target');

    let actualValue = () => getComputedStyle(target).getPropertyValue('--actual');

    assert_equals(actualValue(), 'true_value', '--actual before resize');

    // [<height of frame>, <expected function result>]

    let data = [

      ['100px', 'false_value'],

      ['200px', 'true_value'],

      ['300px', 'false_value']

];

    for (let d of data) {

      iframe.style.height = d[0];

      let expected = d[1];

      assert_equals(actualValue(), expected, `--actual after resize to ${d[0]}`);

});

</script>