iframe-zoom-ref.html

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<!DOCTYPE html>

<title>ref for iframe in an element 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 rel="help" href="https://drafts.csswg.org/css-viewport/">

<style>

body {

  --iframe-width: 128px;

  --iframe-height: 64px;

  --scale: 1;

iframe {

  border: none;

  width: calc(var(--iframe-width) * var(--scale));

  height: calc(var(--iframe-height) * var(--scale));

.scale {

  --scale: 2;

</style>

<iframe id="baseline-ref" src="../resources/leaf.html"></iframe>

<iframe id="zoom-same-origin-ref" class="scale" src="../resources/leaf.html?scale=2"></iframe>

<iframe id="zoom-cross-origin-ref" class="scale" src="../resources/leaf.html?scale=2"></iframe>