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

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



	
		
		
		
	
	
		

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

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