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HTML5 tutorial drawing rectangle code sharing

高洛峰Original: 2017-03-12 16:50:072160browse

html5You can draw many kinds of shapes. The following is the code to draw a rectangle. Please refer to it.

The code is as follows:

<!DOCTYPE html><head> 
<meta charset=utf-8> 
<title>HTML5画矩形</title>
<script src="<a href="http://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js"></script">http://www.php.cn/"></script</a>>
</head> 
<script>
$(document).ready(function(){
var c=document.getElementById("drawbox");
var draw=c.getContext("2d");        //获取2d内容的引用，调用绘图API
draw.fillStyle="#ff0000";            //方式一指定填充颜色
draw.fillRect(0,0,300,100);            //坐标和长宽
draw.fillStyle="rgba(0,0,255,0.5)";    //方式二rgb+透明度
draw.fillRect(400,0,100,100);        //坐标和长宽
})
</script>
</body>
<canvas id="drawbox" width="500" height="500"></canvas>
</body> 
</html>

Effect picture

HTML5 tutorial drawing rectangle code sharing

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