An image sprite is a collection of images put into a single image.
A web page with many images can take a long time to load and generates multiple server requests.
Using image sprites will reduce the number of server requests and save bandwidth.
Advantage of Using CSS Image Sprite
A web page with many images, particularly many small images, such as icons, buttons, etc. can take a long time to load and generates multiple server requests.
Using the image sprites instead of separate images will significantly reduce the number of HTTP requests a browser makes to the server, which can be very effective for improving the loading time of web pages and overall site performance.
Reducing the number of HTTP requests has the major impact on reducing response time that makes the web page more responsive for the user.
Fewer images for the browser to download, which means fewer requests to the server.
How to know if your site need CSS Sprite?
R: Go to http://gtmetrix.com and type your site URL. The test will tell you if is needed a CSS Sprite.
Number of Images: NO LIMIT!
Delivering: VERY FAST!
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