- Tags: Background, Image
- Categories: CSS Properties, CSS Reference, Reference
Quick Reference
The background-size property specifies the size of the background image.
div {
background-image: url("my-background.jpg");
background-positon: right center;
background-repeat: no-repeat;
background-size: 400px 200px;
background-color: red;
}
Values
| Default value | auto |
| Inherited values | no |
| Can it be animated? | yes |
These are the allowed values.
| Value | Description |
|---|---|
| auto | The background image is displayed in its original size (default) |
| length | Sets the width and height of the background image; the first value sets the width, the second value sets the height; if only one value is given, the second is set to “auto” |
| percentage | Sets the width and height of the background image in percent of the parent element; the first value sets the width, the second value sets the height; if only one value is given, the second is set to “auto” |
| cover | Resize the background image to cover the entire container, even if it has to stretch the image or cut off one of the edges |
| contain | Resizes the background image to make sure the image is fully visible |
| initial | Sets this property to its default value |
| inherit | Inherits this property from its parent element |
Using JavaScript
The HTML element can also be styled using JavaScript and the element’s id.
document.getElementById('my_div').style.backgroundSize = '400px 200px';
<button onclick='my_function()'>Click Here</button>
<script>
function my_function() {
document.getElementById('my_div').style.backgroundSize = '400px 200px';
}
</script>
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CSS NOTES:
- The “inherit”, “initial” and “unset” keywords can be used with any CSS property to set its value
- In CSS there are many ways to express a color value in a property
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