<canvas id="mycanvas"></canvas> <script type="text/javascript"> var canvas = document.getElementById('mycanvas'); var c = canvas.getContext('2d'); // 線の色 c.strokeStyle = 'blue'; c.lineWidth = 3; // 線幅 // パスの開始 c.beginPath(); // 折れ線 c.moveTo(50, 30); c.lineTo(250, 30); c.lineTo(50, 120); c.lineTo(250, 120); // 描画 c.stroke(); </script> |