<!DOCTYPE html5><html lang="en"><head> <meta charset="UTF-8"> <title>CSS3-Canvas画布(图形-矩形)</title> <script> window.onload=function () { var canvas=document.getElementById("canvas");//获取canvas对象 var ctx=canvas.getContext("2d"); //建立二维的绘图上下文对象 ctx.rect(50,50,200,200);//定义矩形的边框 ctx.strokeStyle="red"; //填充边框(路径)颜色 ctx.fillStyle="green";//填充边框颜色 ctx.fill(); ctx.stroke(); ctx.clearRect(60,60,100,50);//擦除矩形区域内的图形// ctx.strokeRect(50,50,200,100);//定义无填充的矩形//// ctx.fillStyle="red"; //填充矩形颜色// ctx.fliiRect(50,50,200,100);//定义有填充的矩形 } </script></head><body><h2>Canvas画布(图形)</h2><canvas id="canvas" width="500" height="500" style="border:1px solid red "> 浏览器不支持canvas</canvas></body></html>