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;
}Default
| 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>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
We’d like to acknowledge that we learned a great deal of our coding from W3Schools and TutorialsPoint, borrowing heavily from their teaching process and excellent code examples. We highly recommend both sites to deepen your experience, and further your coding journey. We’re just hitting the basics here at 1SMARTchicken.