forced-synchronous-layout/index.html at main · nucliweb/forced-synchronous-layout · GitHub

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<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Forced Synchronous Layout Demo</title>
    <link rel="stylesheet" href="styles.css" />
  </head>
  <body>
    <header class="toolbar">
      <h1>Forced Synchronous Layout</h1>
      <div class="controls">
        <button id="btn-reproduce" class="btn btn--danger">Reproduce issue</button>
        <button id="btn-fix" class="btn btn--success">Fixed version (double rAF)</button>
        <button id="btn-reset" class="btn btn--neutral">Reset scroll</button>
      </div>
      <p class="hint">
        Open the <strong>Performance Panel</strong> in DevTools and record while clicking each button.
      </p>
    </header>

    <div id="scroll-container" cdkscrollable class="scroll-container">
      <div id="item-list" class="item-list">
        <!-- 3000 elements generated by JS -->
      </div>
    </div>

    <script src="main.js"></script>
  </body>
</html>