content-box-mutation-001.html

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This WPT test may be referenced by the following Test IDs:
- /css/css-transforms/transform-box/content-box-mutation-001.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<html class="reftest-wait">

<title>transform-box: content-box, box border mutated</title>

<link rel="match" href="reference/cssbox-ref.html">

<link rel="help" href="https://drafts.csswg.org/css-transforms-1/#transform-box">

<script src="/common/reftest-wait.js"></script>

<script src="/common/rendering-utils.js"></script>

<meta name="assert" content="This should display a square with a black bar at the top whose top-left corner is at 100,100."/>

<style>

#target {

    width: 150px;

    height: 200px;

    margin-left: 300px;

    margin-top: 100px;

    background-color: green;

    border-left: solid 25px black;

    transform: rotate(90deg);

    transform-origin: -50px 0;

    transform-box: content-box;

</style>

<div id="target"></div>

<script>

  waitForAtLeastOneFrame().then(() => {

    document.querySelector('#target').style.borderLeft = 'solid 50px black';

    takeScreenshot();

});

</script>