您可以尝试运行以下代码在 HTML5 画布中绘制椭圆形 -
<!DOCTYPE HTML> <html> <head> </head> <body> <canvas id="newCanvas" width="450" height="300"></canvas> <script> // canvas var c = document.getElementById('newCanvas'); var context = c.getContext('2d'); var cX = 0; var cY = 0; var radius = 40; context.save(); context.translate(c.width / 2, c.height / 2); context.scale(2, 1); context.beginPath(); context.arc(cX, cY, radius, 0, 2 * Math.PI, false); context.restore(); context.fillStyle = '#000000'; context.fill(); context.lineWidth = 2; context.strokeStyle = 'yellow'; context.stroke(); </script> </body> </html>
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