const { JSDOM } = require("jsdom");
const { window: { document } } = new JSDOM(`
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>JSDOM</title>
</head>
<body>
<input />
</body>
</html>
`);
const logActiveElement = () =>
console.log(`document.activeElement: ${String(document.activeElement)}`);
const button = document.querySelector("input");
logActiveElement();
button.focus();
logActiveElement();
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