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CSS3 flex Property

Topic: CSS3 Properties Reference« Prev|Next »

Description

The flex CSS property specifies the components of a flexible length. It is a shorthand property for setting the flex-grow, flex-shrink and the flex-basis properties at once.

The following table summarizes the usages context and the version history of this property.

Default value: 0 1 auto; See individual properties
Applies to: Flex items
Inherited: No
Animatable: Yes, as each of the properties of the shorthand is animatable. See animatable properties.
Version: New in CSS3

Syntax

The syntax of the property is given with:

flex: 
[ flex-grow flex-shrink flex-basis ] | none | auto | initial | inherit

The example below shows the flex property in action.

  • .flex-container {
  •     -webkit-flex: 1; /* Safari 6.1+ */
  •         -ms-flex: 1; /* IE 10 */
  •             flex: 1; /* Standard syntax */
  • }

Property Values

The following table describes the values of this property.

Value Description
flex-grow Specifies the flex grow factor or positive flexibility for the flex item.
flex-shrink Specifies the flex shrink factor or negative flexibility for the flex item.
flex-basis Specifies the initial size of the flex item.
none Equivalent to setting flex to 0 0 auto.
auto Equivalent to setting flex to 1 1 auto.
initial Sets this property to its default value.
inherit If specified, the associated element takes the computed value of its parent element flex property.

Browser Compatibility

The flex property is supported in all major modern browsers.

Browsers Icon

Basic Support—

  • Firefox 18+ -moz-, 28
  • Google Chrome 21+ -webkit-, 29
  • Internet Explorer 10+ -ms-, 11
  • Apple Safari 6.1+ -webkit-
  • Opera 12.1+

Further Reading

See tutorial on: CSS3 Multi-column Layouts.

Related properties: align-content, align-items, align-self, display, flex-basis, flex-direction, flex-flow, flex-grow, flex-shrink, flex-wrap, justify-content, min-height, min-width, order.

 
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