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Test Info:
- This WPT test may be referenced by the following Test IDs:
- /css/css-pseudo/highlight-cascade/highlight-cascade-003.html - WPT Dashboard Interop Dashboard
<!DOCTYPE html>
<title>Initial custom property values in :root::selection rule</title>
<link rel="match" href="highlight-cascade-003-ref.html">
<meta name="assert" value="This test verifies that the initial value given in a custom property registration is respected, when the property is referenced in ::selection styles but no value is defined. The initial value is not the guaranteed-invalid value, so the fallback value in var() is not used.">
<script src="../support/selections.js"></script>
<style>
@property --bg {
syntax: "<color>";
inherits: false;
initial-value: green;
}
:root::selection {
background-color: var(--bg, red);
}
</style>
<main>PASS if background-color is green when selected</main>
<script>
selectNodeContents(document.querySelector("main"));
</script>