use-iframe-onload.html

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This WPT test may be referenced by the following Test IDs:
- /svg/struct/scripted/use-iframe-onload.html - WPT Dashboard Interop Dashboard

<!doctype html>

<meta charset="utf-8">

<title>An iframe cloned by an SVG use element doesn't run its inline onload handler</title>

<link rel="help" href="https://svgwg.org/svg2-draft/struct.html#UseElement">

<link rel="help" href="https://github.com/w3c/svgwg/issues/876">

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

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

<script>

  window.loads = [];

</script>

<svg>

  <g id="g">

    <foreignObject width="100" height="100">

      <iframe onload="loads.push(this.getRootNode() instanceof ShadowRoot)"></iframe>

    </foreignObject>

  </g>

  <use href="#g"/>

</svg>

<script>

  promise_test(async function() {

    await new Promise(resolve => window.addEventListener("load", resolve));

    await new Promise(resolve => requestAnimationFrame(() => requestAnimationFrame(resolve)));

    await new Promise(resolve => step_timeout(resolve, 0));

    assert_array_equals(loads, [false], "Only the original iframe's onload handler should run");

  }, "Inline onload handler of an iframe in a use element shadow tree doesn't run");

</script>