2049397.html - mozsearch

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<!DOCTYPE html>

<html class="reftest-wait">

<head>

<script>

let container = document.createElement('div');

let image = null;

class XImage extends HTMLImageElement {

  constructor() {

    super();

    image = this;

    let form = document.querySelector('form');

    let div = form.querySelector('div');

    container.appendChild(form);

    this.appendChild(div);

customElements.define('x-image', XImage, {extends: 'img'});

onload = () => {

  container = null;

  setTimeout(() => {

    // Force GC and CC.

    SpecialPowers.forceShrinkingGC();

    SpecialPowers.forceCC();

    SpecialPowers.forceShrinkingGC();

    SpecialPowers.forceCC();

    image.setAttribute('name', 'boom');

    document.documentElement.classList.remove("reftest-wait");

  }, 0);

};

</script>

</head>

<body>

<form>

<div id="p">

<img is="x-image">

</div>

</form>

</body>

</html>