与大家分享几个有关canvas的代码（一）-优快云博客

本文介绍了HTML5 Canvas的基础使用，包括基本绘图、线条绘制、渐变填充等操作。

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第一个

<!DOCTYPE html>
<html>
<body>


<canvas id="myCanvas" width="200" height="100" style="border:1px solid #c3c3c3;">
Your browser does not support the HTML5 canvas tag.
</canvas>


<script type="text/javascript">


var c=document.getElementById("myCanvas");
var ctx=c.getContext("2d");
ctx.fillStyle="#FF0000";
ctx.fillRect(0,0,150,75);


</script>


</body>
</html>

第二个

<!DOCTYPE html>
<html>
<body>


<canvas id="myCanvas" width="200" height="100" style="border:1px solid #c3c3c3;">
Your browser does not support the HTML5 canvas tag.
</canvas>


<script type="text/javascript">


var c=document.getElementById("myCanvas");
var ctx=c.getContext("2d");
ctx.moveTo(10,10);
ctx.lineTo(150,50);
ctx.lineTo(10,50);
ctx.stroke();


</script>


</body>
</html>

第三个

<!DOCTYPE html>
<html>
<body>


<canvas id="myCanvas" width="200" height="100" style="border:1px solid #c3c3c3;">
Your browser does not support the HTML5 canvas tag.
</canvas>




<script type="text/javascript">


var c=document.getElementById("myCanvas");
var ctx=c.getContext("2d");
var grd=ctx.createLinearGradient(0,0,175,50);
grd.addColorStop(0,"#FF0000");
grd.addColorStop(1,"#00FF00");
ctx.fillStyle=grd;
ctx.fillRect(0,0,175,50);


</script>


</body>
</html>