HTML Code

<!DOCTYPE html>

<html lang=en>

<head>

  <meta charset=UTF-8>

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

  <title>Basic Canvas 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}</style>

</head>

<body>

  <h1>HTML canvas Tag</h1>

  <p>A 400&times;200 pixel drawing surface.</p>

  <canvas id=demo width=400 height=200 aria-label="Demo canvas with a light blue square"></canvas>

  <script>var canvas=document.getElementById("demo"),ctx=canvas.getContext("2d");ctx.fillStyle="#bae6fd",ctx.fillRect(50,50,100,100)</script>

</body>

</html>

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HTML canvas Tag — Basic Canvas Element