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

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2016-05-16 17:32:561307browse

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.
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