web-vitals-google-analytics-bigquery/basic.html

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<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="utf-8">
  <title>Web Vitals Test</title>
  <meta name="viewport" content="width=device-width, initial-scale=1">
</head>

<body>
  <p><img style="max-width: 360px" src="https://placekitten.com/g/3840/2160" alt="Kitten" /></p>
  <p>Text below image</p>

  <script type="module">
    import { onCLS, onINP, onLCP } from 'https://unpkg.com/web-vitals?module';

    onCLS(console.log);
    onINP(console.log);
    onLCP(console.log);
  </script>
</body>

</html>