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<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>Selection painting result when "CDEFG" is selected</title>
<script>
"use strict";
addEventListener("DOMContentLoaded", async () => {
const text = document.querySelector("p").firstChild;
const splitAt = parseInt((new URLSearchParams(location.search)).get("splitAt"));
const newText = text.splitText(splitAt);
const [startContainer, startOffset] = (function() {
if (splitAt > "AB".length) {
return [text, "AB".length];
}
return [newText, "AB".length - splitAt];
})();
const [endContainer, endOffset] = (function() {
if (splitAt > "ABCDEFG".length) {
return [text, "ABCDEFG".length];
}
return [newText, "ABCDEFG".length - splitAt];
})();
getSelection().setBaseAndExtent(startContainer, startOffset, endContainer, endOffset);
}, {once: true});
</script>
</head>
<body>
<p>ABCDEFGHI</p>
</body>
</html>