编程狮在线代码实例

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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>W3Cschool教程(w3cschool.cn)</title>
</head>
<body>
​
<p>图片应用:</p>
<img src="/statics/images/lamp.jpg" id="lamp">
<p>画布:</p>
<button onclick="draw('repeat')">重复</button> 
<button onclick="draw('repeat-x')">重复-x</button> 
<button onclick="draw('repeat-y')">重复-y</button> 
<button onclick="draw('no-repeat')">不重复</button>     
<canvas id="myCanvas" width="300" height="150" style="border:1px solid #d3d3d3;">
您的浏览器不支持 HTML5 canvas 标签。
</canvas>
<script>
function draw(direction){
  var c=document.getElementById("myCanvas");
  var ctx=c.getContext("2d");
  ctx.clearRect(0,0,c.width,c.height); 
  var img=document.getElementById("lamp")
  var pat=ctx.createPattern(img,direction);
  ctx.rect(0,0,220,128);
  ctx.fillStyle=pat;
  ctx.fill();
}
</script>
​
</body>
</html>
实例代码
运行结果