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- <html>
- <head>
- <title>a - test</title>
- </head>
- <body>
- <h1>page a</h1>
- <div>a</div>
- </body>
- <script>
- setTimeout(() => {
- let el = document.createElement('div');
- el.dataset.name = 'el';
- document.body.appendChild(el)
- }, 500)
- </script>
- </html>
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