CSS flex Property
Example
Let all the flexible items be the same length, regardless of its content:
#main div {
-ms-flex: 1; /* IE 10 */
flex: 1;
}
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Tip: More "Try it Yourself" examples below.
Definition and Usage
The flex property is a shorthand property for:
The flex property sets the flexible length on flexible items.
Note: If the element is not a flexible item, the flex property has no effect.
| Default value: | 0 1 auto |
|---|---|
| Inherited: | no |
| Animatable: | yes, see individual properties. Read about animatable |
| Version: | CSS3 |
| JavaScript syntax: | object.style.flex="1" Try it |
Browser Support
The numbers in the table specify the first browser version that fully supports the property.
Numbers followed by -webkit-, -ms- or -moz- specify the first version that worked with a prefix.
| Property | |||||
|---|---|---|---|---|---|
| flex | 29.0 21.0 -webkit- |
11.0 10.0 -ms- |
28.0 18.0 -moz- |
9.0 6.1 -webkit- |
17.0 |
CSS Syntax
flex: flex-grow flex-shrink flex-basis|auto|initial|inherit;
Property Values
| Value | Description | Demo |
|---|---|---|
| flex-grow | A number specifying how much the item will grow relative to the rest of the flexible items | Demo ❯ |
| flex-shrink | A number specifying how much the item will shrink relative to the rest of the flexible items | |
| flex-basis | The length of the item. Legal values: "auto", "inherit", or a number followed by "%", "px", "em" or any other length unit | Demo ❯ |
| auto | Same as 1 1 auto. | |
| initial | Same as 0 1 auto. Read about initial | |
| none | Same as 0 0 auto. | |
| inherit | Inherits this property from its parent element. Read about inherit |
More Examples
Example
Using flex together with media queries to create a different layout for different screen sizes/devices:
.flex-container {
display: flex;
flex-wrap: wrap;
}
.flex-item-left {
flex: 50%;
}
.flex-item-right {
flex: 50%;
}
/* Responsive layout - makes a one column layout (100%) instead of a two-column
layout (50%) */
@media (max-width: 800px) {
.flex-item-right,
.flex-item-left {
flex: 100%;
}
}
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Related Pages
CSS Tutorial: CSS Flexible Box
CSS Reference: flex-basis property
CSS Reference: flex-direction property
CSS Reference: flex-flow property
CSS Reference: flex-grow property
CSS Reference: flex-shrink property
CSS Reference: flex-wrap property
HTML DOM reference: flex property