tryjsref_canvas_create 在线代码实例

实例代码( Tip: 登录后体验更佳 )
运行代码

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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>W3Cschool教程(w3cschool.cn)</title>
<style>
canvas {border:1px solid black;}
</style>
</head>
<body>
<button onclick="myFunction()">尝试一下</button>
<p>点击按钮创建 CANVAS 元素，绘制一个红色矩形。</p>
<script>
function myFunction(){
    var x = document.createElement("CANVAS");
    var ctx=x.getContext("2d");
    ctx.fillStyle="#FF0000";
    ctx.fillRect(20,20,150,100);
    document.body.appendChild(x);
}
</script>
</body>
</html>
 
 
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运行结果
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