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   | <!DOCTYPE html> <html>   <head>     <title>Canvas</title>     <meta charset="UTF-8" />     <meta name="viewport" content="width=device-width, initial-scale=1" />     <style>       body {         margin: 0;       }       .canvas {         width: 500px;         height: 300px;         background: #eee;       }     </style>   </head>
    <body>     <h1>캔버스 사이즈 설정</h1>     <canvas class="canvas" width="500" height="300"></canvas>     <canvas class="canvas canvas2" width="1000" height="600"></canvas>
      <script>       const canvas = document.querySelector(".canvas");       const canvas2 = document.querySelector(".canvas2");       const context = canvas.getContext("2d");       const context2 = canvas2.getContext("2d");
        context.arc(100, 100, 50, 0, Math.PI * 2, false);       context2.arc(100, 100, 50, 0, Math.PI * 2, false);       context.fill();       context2.fill();     </script>   </body> </html>
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