cssom-additive-symbols-setter.html

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This WPT test may be referenced by the following Test IDs:
- /css/css-counter-styles/cssom/cssom-additive-symbols-setter.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<title>CSSCounterStyleRule additiveSymbols setter</title>

<link rel="help" href="https://www.w3.org/TR/css-counter-styles-3/#the-csscounterstylerule-interface">

<link rel="author" href="mailto:xiaochengh@chromium.org">

<link rel="match" href="cssom-additive-symbols-setter-ref.html">

<style id="sheet">

@counter-style foo {

  system: additive;

  additive-symbols: 1 I, 0 O;

</style>

<ol style="list-style-type: foo; list-style-position: inside" start=0>

  <li></li>

  <li></li>

  <li></li>

</ol>

<script>

// Force layout update before changing the rule

document.body.offsetWidth;

const sheet = document.getElementById('sheet');

const foo_rule = sheet.sheet.rules[0];

foo_rule.additiveSymbols = '2 C, 1 B, 0 A';

</script>