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您可以尝试运行以下代码在 html5 画布中绘制椭圆形 -

示例

<!DOCTYPE HTML>
<html>
   <head>
   </head>
   <body>
      <canvas id="newCanvas" width="450" height="300"></canvas>
      <script>
         // canvas

         var c = document.getElementById(&#39;newCanvas&#39;);
         var context = c.getContext(&#39;2d&#39;);
         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 = &#39;#000000&#39;;
         context.fill();
         context.lineWidth = 2;
         context.strokeStyle = &#39;yellow&#39;;
         context.stroke();
      </script>
   </body>
</html>

输出

如何在HTML5画布中绘制椭圆？