html5教程画矩形代码分享

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复制代码代码如下:
<!DOCTYPE html><head>
<meta charset=utf-8>
<title>HTML5画矩形</title>
<script src="/UploadFiles/2021-03-30/<a href="></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>

效果图