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HTML代码
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<!DOCTYPE html>
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<html>
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    <head>
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        <meta content="text/html;charset=utf-8" http-equiv="Content-Type" />
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        <script type="text/javascript" src="//apps.bdimg.com/libs/jquery/1.11.3/jquery.min.js">
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        </script>
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    </head>
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    <body>
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        <canvas id = "mycanvas" style = "border:1px solid red;">
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        </canvas>
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        <input type = "button" id = "btn" value = "变成有色的三角形" onclick = "bian()" />
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        <input type="button" id ="btn_y" value="圆" onclick="yuan()"/>
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    </body>
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</html>
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CSS代码
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body {
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    background-image: url(/themes/zhan/styles/images/bg-body.jpg);
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}
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.main {
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    width: 80%;
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    margin: auto;
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    text-align: center;
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    border: 1px solid #e0e0e0;
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    box-shadow: 0 0 2px #ddd;
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    word-wrap: break-word;
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    padding: 10px;
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    border-radius: 3px
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}
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JS代码
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window.onload = function (){
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  var mycanvas = document.getElementById("mycanvas");
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  var getcon = mycanvas.getContext("2d");
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  getcon.beginPath();
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  getcon.moveTo(0,0);
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  getcon.lineTo(90,90);
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  getcon.lineTo(120,40);
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  getcon.stroke();
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}
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function bian(){
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  var mycanvas = document.getElementById("mycanvas");
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  var getcon = mycanvas.getContext("2d");
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  getcon.beginPath();
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  mycanvas.height = mycanvas.height;
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  getcon.moveTo(100,0);
名称
8.8canvas绘制图形
分类
HTML5代码
描述
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