File: script-inserted-style-element.html

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<!doctype html>
<title>Script-inserted style elements with "blocking=render" are render-blocking</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="support/test-render-blocking.js"></script>

<script>
const style = document.createElement('style');
style.blocking = 'render';
style.textContent = "@import url('support/target-red.css?pipe=trickle(d1)');";
document.head.appendChild(style);
</script>

<div class="target">
  This should be red
</div>

<script>
test_render_blocking(
    style,
    () => {
      let color = getComputedStyle(document.querySelector('.target')).color;
      assert_equals(color, 'rgb(255, 0, 0)');
    },
    'Render-blocking stylesheet is applied');
</script>