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<!-- Any copyright is dedicated to the Public Domain.
<html>
<head>
<title>CSSOM test</title>
<script>
"use strict";
window.onload = function() {
const x = document.styleSheets[0];
x.insertRule("div { color: seagreen; }", 1);
// Add a rule with a leading newline, to test that inspector can handle it.
x.insertRule("\ndiv { font-weight: bold; }", 1);
};
</script>
<style>
span { }
</style>
</head>
<body>
<div id="target"> the ocean </div>
</body>
</html>