<!DOCTYPE html> <meta charset="UTF-8"> <title>CSS Highlight API Test: </title> <link rel="help" href="https://drafts.csswg.org/css-highlight-api-1/"> <link rel="match" href="custom-highlight-painting-001-ref.html"> <meta name="assert" value="Registering the same Highlight under different names and again with a used name works as it should."> <style> ::highlight(foo) { color: blue; } ::highlight(bar) { background-color: yellow; } </style> <body><span>One </span><span>two </span><span>three…</span> <script> let r = new Range(); r.setStart(document.body, 0); r.setEnd(document.body, 2); let h = new Highlight(r); CSS.highlights.set("foo", h); CSS.highlights.set("bar", h); CSS.highlights.set("foo", h); </script>