- Tags: Border
- Categories: CSS Properties, CSS Reference, Reference
Quick Reference
The border-radius property defines the radius of an element’s corners to give the element rounded corners. This property can have from one to four values.
/* all borders have an equal radius */
div {
border-radius: 20px;
}
/* the first value is for the top-left and bottom-right corners; the second value is for the top-right and bottom-left corners */
div {
border-radius: 20px 50px;
}
/* the first value is for the top-left corner; the second value is for the top-right and bottom-left corners; and the third value is for the bottom-right corner*/
div {
border-radius: 20px 50px 5px;
}
/* the first value is for the top-left corner; the second value is for the top-right corner; the third value is for the bottom-right corner; and the fourth value is for the bottom-left corner*/
div {
border-radius: 20px 50px 100px 5px;
}
Values
| Default value | 0 |
| Inherited values | no |
| Can it be animated? | yes |
These are the allowed values.
| Value | Description |
|---|---|
| length | Defines the shape of the corners (default value is 0) |
| % | Defines the shape of the corners in % |
| 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.borderRadius = '20px';
<button onclick='my_function()'>Click Here</button>
<script>
function my_function() {
document.getElementById('my_div').style.borderRadius = '20px';
}
</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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