(January 11) http://www.handandaily.com
First of all, I want to talk about the slow speed of opening the blog Park.
If you know this technology, you don't need to come in,
1. First, open the following two links: (the following links are not common images, and are non-toxic and ad-free)
Http://static.ak.facebook.com/images/sprite/icons.png? Db3
Http://www.google.com/images/nav_logo3.png
On the Google homepagebodyOfonloadThere is such a sentence:
if(document.images){new Image().src='/images/nav_logo3.png'}
Let's take a look at this.http://www.google.com/images/nav_logo3.pngWhat is it?
It is:
Css Sprites combines all css decoration diagrams on the page into a large image, and then uses the css background-image: Big image, background-position: the position x of the thumbnail in the big image, and the position y of the thumbnail in the big image
Advantage: the use of Css Sprites can improve the performance of the website. A large number of images produced in normal production mode are merged into one image, greatly reducing the number of HTTP connections. The number of HTTP connections has an important impact on the website loading performance.
According to the rules of yahoo's rules for high performance web sites, the number of HTTP requests between the Client and the Server should be reduced.
Using the CSS Sprites method to assemble multiple images into a single image can effectively reduce the number of HTTP requests.
More CSS Sprites
Http://www.handandaily.com/post/cat_8.html
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