<body>
<canvas id="canvas"></canvas>
<script>
var canvas=document.getElementById("canvas");
canvas.setAttribute('height',768);
canvas.setAttribute("width",1024);
// canvas.width="1024";
// canvas.height="738";
var context=canvas.getContext("2d");
console.log(context)
</script>
</body>etAttribute('height',768)这种方法不支持ie8及以下浏览器,那么被注释掉的内容支持吗?柠檬酸钠