Consistent way of finding element height after nested image has loaded

问题

I have a div.bodywhich contains an img amongst a couple more elements.

I need to get the height of div.body after img has been loaded.

I'm currently using the following to measure:

var $body = $("div.body");
$body.find("img").ready(function(){
   var bodyHeight = $body.outerHeight();
});

This returns the correct height 90% of the time, however some times it is returning the height not including the height of the image.

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For example, if the other elements in div.body sum up to 50px, and my image has a height of 150px, I need to get 200px, however sometimes this is returning just 50px.

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Why is this? Shouldn't the .ready() function only be called after the image has loaded?

Should I be using a different method?

What is a 100% consistent way of running this code once the image is available?

回答1:

.ready() runs when the entire page's DOM is loaded. You want .load().

See the discussion section here for an implementation that works for dynamically added content.

回答2:

Per jQuery's documentation, there are a number of caveats for using the load event with images.

Take a look here:

jQuery event for images loaded

and here:

https://github.com/desandro/imagesloaded

来源：https://stackoverflow.com/questions/13489883/consistent-way-of-finding-element-height-after-nested-image-has-loaded