Fabric.js 初始化后将我的画布大小更改为 300x150

Javascript
var canvas = new fabric.Canvas('myCanvas');

Javascript
canvas.setDimensions({ width: 300, height: 150 });

html
<!DOCTYPE html>
<html>
<head>
  <script src="https://cdnJS.cloudflare.com/Ajax/libs/fabric.JS/3.6.3/fabric.min.JS"></script>
</head>
<body>
  <canvas id="myCanvas" width="300" height="150"></canvas>
  <script>
    var canvas = new fabric.Canvas('myCanvas');
    canvas.setDimensions({ width: 300, height: 150 });
  </script>
</body>
</html>