js 创建 canvas

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var canvas = document.createElement('canvas');


1.给页面的div添加canvas

<html><head>    <title></title></head><body><div id="lineArea"></div><script type="text/javascript">    var canvasList = document.getElementById('lineArea');    var canvas = document.createElement('canvas');    canvasList.appendChild(canvas);    canvas.width = 1000; //☜    canvas.height = 500;    canvas.style.backgroundColor = '#FF0000';</script></body></html>


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