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js determines whether the background image is loaded successfully using img's width implementation_javascript skills

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Release： 2016-05-16 17:32:56

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Non-background pictures can be judged using img's onerror, but as for background pictures, I just accidentally discovered a method that is feasible by visual inspection, but I am not sure whether it is always feasible.

Copy code The code is as follows:

 
var img=new Image(); 
img .src="image address"; 
if(img.width==0){//Indicates that the image loading failed} 
else{//Successful} 

This method It is generally feasible, but we have tested whether it is feasible when the image is very large or the loading speed is very slow.

Related labels：

load Background picture

source：php.cn

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