Quick Reference
The width property sets the width of an element, not including padding, borders, or margins.
div {
width: 300px;
}Default
| Default value | auto |
| Inherited values | no |
| Can it be animated? | yes |
These are the allowed values.
| Value | Description |
|---|---|
| auto | The browser calculates the width (default) |
| length | Defines the width in px, cm, etc. |
| % | Defines the width in percent of the parent element |
| 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.width = '300px';<button onclick='my_function()'>Click Here</button>
<script>
function my_function() {
document.getElementById('my_div').style.width = '300px';
}
</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.