CSS Image Sprites
A Basic Implementation
What's an image sprite?
An image sprite is a single asset located within an image sprite sheet. An image sprite sheet is an image file that contains more than one asset that can be extracted from it.
For example:
The image above is an image sprite sheet, and each one of those stars is a sprite within the sprite sheet. These sprite sheets are useful because they improve performance by reducing the number of HTTP requests a browser might have to make.
So how do you implement one? Here's some example code.
HTML
<div class="icon icon1"></div>
<div class="icon icon2"></div>
<div class="icon icon3"></div>
CSS
.icon {
background: url(“icons-sprite.png”);
display: inline-block;
height: 20px;
width: 20px;
}
.icon1 {
background-position: 0px 0px;
}
.icon2 {
background-position: -20px 0px;
}
.icon3 {
background-position: -40px 0px;
}
By using setting the sprite's width and height and by using the background-position property in CSS (with an x and y value) you can easily extract sprites from a sprite sheet using CSS.
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