HTML Code

<!DOCTYPE html>

<html lang=en>

<head>

  <meta charset=UTF-8>

  <meta name=viewport content="width=device-width,initial-scale=1">

  <title>Canvas Fallback Example</title>

  <style>body{font-family:system-ui,sans-serif;margin:0;padding:1.5rem;background:#f8fafc;color:#334155}h1{margin:0 0 .75rem;font-size:1.25rem;color:#0f172a}p{margin:0 0 1rem;font-size:.95rem;line-height:1.6}canvas{border:1px solid #94a3b8;border-radius:6px;background:#fff}.note{margin-top:.75rem;background:#fffbeb;border:1px solid #fde68a;border-radius:8px;padding:.75rem 1rem;font-size:.875rem;color:#92400e;max-width:440px}</style>

</head>

<body>

  <h1>Canvas Fallback</h1>

  <p>Content inside <code>&lt;canvas&gt;</code> shows only if canvas is unsupported.</p>

  <canvas id=demo width=400 height=200 aria-label="Canvas demo with fallback message">

    Your browser does not support the HTML canvas element.

  </canvas>

  <p class=note>Always provide meaningful fallback or alternative description for accessibility.</p>

  <script>var canvas=document.getElementById("demo"),ctx=canvas.getContext("2d");ctx.fillStyle="#bae6fd",ctx.fillRect(50,50,300,100),ctx.fillStyle="#0f172a",ctx.font="20px system-ui, sans-serif",ctx.fillText("Canvas works!",140,110)</script>

</body>

</html>

Lines: 0 | Characters: 0

Live Preview Auto-refresh on Run

HTML canvas Tag — Fallback Content