CSS flex-basis Property


Set the initial length of the second flex-item to 80 pixels:

div:nth-of-type(2) {
    -webkit-flex-basis: 80px; /* Safari 6.1+ */
    flex-basis: 80px;

Try it yourself »

Definition and Usage

The flex-basis property specifies the initial length of a flexible item.

Note: If the element is not a flexible item, the flex-basis property has no effect.

Default value: auto
Inherited: no
Animatable: yes. Read about animatable Try it
Version: CSS3
JavaScript syntax: object.style.flexBasis="200px" Try it

Browser Support

The numbers in the table specify the first browser version that fully supports the property.

Numbers followed by -webkit- or -moz- specify the first version that worked with a prefix.

flex-basis 29.0
21.0 -webkit-
11.0 28.0
18.0 -moz-
6.1 -webkit-  12.10

CSS Syntax

flex-basis: number|auto|initial|inherit;

Property Values

Value Description Play it
number A length unit, or percentage, specifying the initial length of the flexible item(s) Play it »
auto Default value. The length is equal to the length of the flexible item. If the item has no length specified, the length will be according to its content Play it »
initial Sets this property to its default value. Read about initial Play it »
inherit Inherits this property from its parent element. Read about inherit

Related Pages

CSS Reference: flex 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: flexBasis property




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