js+canvas绘制矩形的⽅法本⽂实例讲述了js+canvas绘制矩形的⽅法。分享给⼤家供⼤家参考,具体如下:
运⾏效果截图如下:
具体代码如下:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="/1999/xhtml">
<head>
<title>canvas绘制矩形</title>
<script type="text/javascript" >
function draw(id) {
var canvas = ElementById("canvas");
if (canvas) {
var context = Context("2d");
context.fillStyle = "#DDDDDD";
context.fillRect(0, 0, 400, 400);
context.strokeStyle = "black";
html矩形框代码怎么写context.fillStyle = "gray";
context.lineWidth = 5;
context.fillRect(0,0,200,300);
context.strokeRect(0,0,200,200);
} else {
return;
}
}
function drawBorder(id) {
var canvas = ElementById("canvas2");
if (canvas) {
var context = Context("2d");
context.fillStyle = "red";
context.strokeStyle = "black";
context.lineWidth = 5;
context.fillRect(0,0, 300, 200);
context.strokeRect(0,0,300,200);
} else {
return;
}
}
draw("canvas");
drawBorder("canvas2");
}
</script>
</head>
<body>
<canvas id="canvas" width="400" height="400"></canvas>
<hr />
<canvas id="canvas2" width="400"  height="400"></canvas>
</body>
</html>
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希望本⽂所述对⼤家JavaScript程序设计有所帮助。

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