html5教程,画矩形
<!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://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js"></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>
效果图
html5教程,画矩形
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