fmpq.com
源代码：
点击运行
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>Fmpq教程(fmpq.com)</title> <style> canvas {border:1px solid black;} </style> </head> <body> <button onclick="myFunction()">尝试一下</button> <p>点击按钮创建 CANVAS 元素，绘制一个红色矩形。</p> <script> function myFunction(){ var x = document.createElement("CANVAS"); var ctx=x.getContext("2d"); ctx.fillStyle="#FF0000"; ctx.fillRect(20,20,150,100); document.body.appendChild(x); } </script> </body> </html>
运行结果