Why do browsers inefficiently make 2 requests here?

Question

I noticed something odd regarding ajax and image loading. Suppose you have an image on the page, and ajax requests the same image - one would guess that ajax requests would hit

Answer 1

I use the newest Google Chrome and it makes one request. But in your JSFIDDLE example you are loading jQuery twice. First with CSS over style attribute and second in your code over script tag. Improved: JSFIDDLE

Hello

jQuery(function($) {...} is called when DOM is ready and jQuery(window).load(...); if DOM is ready and every image and other resources are loaded. To put both together nested makes no sense, see also here: window.onload vs $(document).ready()

Sure, the image is loaded two times in Network tab of the web inspector. First through your CSS and second through your JavaScript. The second request is probably cached.

UPDATE: But every request if cached or not is shown in this tab. See following example: http://jsfiddle.net/95mnf9rm/4/ There are 5 request with cached AJAX calls and 5 without caching. And 10 request are shown in 'Network' tab. When you use your image twice in CSS then it's only requested once. But if you explicitly make a AJAX call then the browser makes an AJAX call. As you want. And then maybe it's cached or not, but it's explicitly requested, isn't it?