<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>html5 canvas文本处理</title> <script src="js/modernizr.js"></script> </head> <body> <script type="text/javascript"> window.addEventListener(‘load‘,eventWindowLoaded,false); function eventWindowLoaded(){ canvasApp(); } function canvasSupport(){ return Modernizr.canvas; } function canvasApp(){ if(!canvasSupport()){ return; }else{ var theCanvas = document.getElementById(‘canvas‘) var context = theCanvas.getContext("2d") } var message="your text" function drawScreen(){ context.font = ‘50px serif‘; context.fillStyle = ‘#ff0000‘; context.fillText(message,100,80); } var formElement = document.getElementById("textbox")
//绑定textbox输入框 formElement.addEventListener(‘keyup‘,textBoxChanged,false);
//然后通过addEventListener()方法设置keyup事件，然后处理textBoxChanged函数 function textBoxChanged(e){ var target = e.target; message=target.value; drawScreen(); } } </script> <canvas id="canvas" width="500" height="500"> 你的浏览器无法使用canvas 小白童鞋；你的支持是我最大的快乐！！ </canvas> <form> Text:<input id="textbox" placeholder="your text" /><br /> </form> </body> </html>
原文：http://www.cnblogs.com/LoveOrHate/p/4456768.html