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- This WPT test may be referenced by the following Test IDs:
- /mathml/crashtests/first-letter-contributed-to-ancestor.html - WPT Dashboard Interop Dashboard
<!DOCTYPE html>
<style>
math {
display: inline-block;
}
math::first-letter {
background-color: blue;
}
</style>
<math>
<mo id="mo">%</mo>
</math>
<script>
mo.appendChild(document.createTextNode("A"));
document.body.innerText += "";
</script>