Uncaught DOMException: Failed to execute 'drawImage' on 'CanvasRenderingContext2D'：

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我是靠谱客的博主腼腆鸵鸟，最近开发中收集的这篇文章主要介绍Uncaught DOMException: Failed to execute 'drawImage' on 'CanvasRenderingContext2D'：，觉得挺不错的，现在分享给大家，希望可以做个参考。

概述

问题：Uncaught DOMException: Failed to execute 'drawImage' on 'CanvasRenderingContext2D'：The HTMLImageElement provided is in the 'broken' state.

分析：Uncaught DOMException表明未获取dom元素

The HTMLImageElement provided is in the 'broken' state.表明元素在获取过程中被中断了，也即元素可能没有正确获取

图片路径不正确导致图片未正确获取也将导致该错误

代码

HTML文件

<!DOCTYPE>
<html>
	<head>
		<mata name="viewport" content="width=device-width,initial-scale=1">
		<script type="text/javascript" src="js/jquery-1.11.0.min.js"></script>
		
	</head>
	<body>
		<div>
			<canvas id="start" width="800" height="600">
			</canvas>
		</div>
		 <img src="./img/girl.jpg" id="img" style="display:none"/>  <!--正确路径-->
		<script type="text/javascript" src="js/commonFunctions.js"></script>
		<script type="text/javascript" src="js/star.js"></script>
			
	</body>
</html>

start.js:

var can;
var ctx;
var width;
var height;
var imgGirl=new Image();
// $(document).ready(function(){
// 	init();
// })
document.body.οnlοad=init;
function init(){
	can=document.getElementById("start");
	ctx=can.getContext("2d");

	width=can.width;
	height=can.height;
	imgGirl.src="../img/girl.jpg"//注意文件路径 正确路径为：./img/girl.jpg
	gameLoop();
}

function drawBg(){
	ctx.fillStyle="#393550";
	ctx.fillRect(0,0,width,height);
}
/** [gameLoop 刷新画布] */
function gameLoop(){
	window.requestAnimFrame(gameLoop);
	drawBg();
	drawImg();
}

//根据设备性能进行调用
function drawImg(){
	// star.js:39 Uncaught DOMException: Failed to execute 'drawImage' on 'CanvasRenderingContext2D': 
	// The HTMLImageElement provided is in the 'broken' state.
	// 分析：Uncaught DOMException表明未获取dom元素
	// 		  The HTMLImageElement provided is in the 'broken' state.表明元素在获取过程中被中断了，也即元素可能还在加载中
	ctx.drawImage(imgGirl,100,100)
}

解决办法：

先判断图片路径在js中是否正确：

在html中添加img标签，通过js赋值看是否可以正常显示，若可以则路径正确