为什么我修改不了canvas画布大小

源自：1-2 绘制米字格，复习canvas

为什么我修改不了canvas画布大小

html文件代码

<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">

<head lang = "en">

<meta charset=utf-8" />

<title>121212</title>

<script src="jquery-2.1.3.min.js" type = "text/javascript"></script>

<link href="handwriting.css" rel="stylesheet" type="text/css"/>

</head>

<body>

<canvas id="canvas">

您的浏览器不支持canvas

</canvas>

<script src = "handwriting.js"></script>

</body>

</html>

JS文件代码：

var canvasWidth = 800

var canvasHeight = canvasWidth

var canvas = document.getElementById("canvas")[0]

var context = convas.getContext('2d')

canvas.width = canvasWidth

canvas.height = canvasHeight

提问者：BuFang_Q 2016-02-13 21:42

个回答

问天012

2016-04-14 11:32:23

var canvas = document.getElementById("canvas")[0]这里要加[0]么？

0
慕慕7149077

2016-02-14 22:28:46

var canvasWidth=Math.min(800,$(window).width()-20);

0