iframe-zoom-nested.html

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This WPT test may be referenced by the following Test IDs:
- /css/css-viewport/zoom/iframe-zoom-nested.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<html class="reftest-wait">

<head>

<title>nested iframes with CSS zoom</title>

<link rel="author" title="Yotam Hacohen" href="mailto:yotha@chromium.org">

<link rel="author" title="Stefan Zager" href="mailto:szager@chromium.org">

<link rel="author" title="Google" href="http://www.google.com/">

<link href="reference/iframe-zoom-nested-ref.html" rel="match">

<link rel="help" href="https://drafts.csswg.org/css-viewport/">

<style>

body {

  columns: 2;

  --iframe-width: 256px;

  --iframe-height: 128px;

iframe {

  border: none;

  width: var(--iframe-width);

  height: var(--iframe-height);

.zoom {

  zoom: 1.5;

</style>

</head>

<body>

<iframe id="baseline" src="resources/nested-iframe.html" scrolling="no"></iframe>

<iframe id="zoom-child" src="resources/nested-iframe.html?zoom=2" scrolling="no"></iframe>

<iframe id="zoom-top" class="zoom" src="resources/nested-iframe.html" scrolling="no"></iframe>

<iframe id="zoom-top-child" class="zoom" src="resources/nested-iframe.html?zoom=2" scrolling="no"></iframe>

<script>

// Wait for all iframes to load before allowing the screenshot

let loadedCount = 0;

const iframes = document.querySelectorAll('iframe');

const totalFrames = iframes.length;

iframes.forEach(iframe => {

  iframe.onload = function() {

    loadedCount++;

    if (loadedCount === totalFrames) {

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

};

});

</script>