Web/CSS/flex-grow

The flex-grow CSS property sets the flex grow factor of a flex item main size.

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Syntax

/* <number> values */
flex-grow: 3;
flex-grow: 0.6;

/* Global values */
flex-grow: inherit;
flex-grow: initial;
flex-grow: unset;

The flex-grow property is specified as a single <number>.

Values

<span id="<number>"><number>: See <number>. Negative values are invalid. Defaults to 0.

Description

This property specifies how much of the remaining space in the flex container should be assigned to the item (the flex grow factor).

The main size is either width or height of the item which is dependent on the flex-direction value.

The remaining space is the size of the flex container minus the size of all flex items' sizes together. If all sibling items have the same flex grow factor, then all items will receive the same share of remaining space, otherwise it is distributed according to the ratio defined by the different flex grow factors.

flex-grow is used alongside the other flex properties flex-shrink and flex-basis, and normally defined using the flex shorthand to ensure all values are set.

Formal definition

Initial value	`0`
Applies to	flex items, including in-flow pseudo-elements
Inherited	no
Computed value	as specified
Animation type	a number

Formal syntax

<number>

Examples

Setting flex item grow factor

HTML

<h4>This is a Flex-Grow</h4>
<h5>A,B,C and F are flex-grow:1 . D and E are flex-grow:2 .</h5>
<div id="content">
  <div class="box" style="background-color:red;">A</div>
  <div class="box" style="background-color:lightblue;">B</div>
  <div class="box" style="background-color:yellow;">C</div>
  <div class="box1" style="background-color:brown;">D</div>
  <div class="box1" style="background-color:lightgreen;">E</div>
  <div class="box" style="background-color:brown;">F</div>
</div>

CSS

#content {
  display: flex;

  justify-content: space-around;
  flex-flow: row wrap;
  align-items: stretch;
}

.box {
  flex-grow: 1;
  border: 3px solid rgba(0,0,0,.2);
}

.box1 {
  flex-grow: 2;
  border: 3px solid rgba(0,0,0,.2);
}

Result

Specifications

Specification	Status	Comment
CSS Flexible Box Layout ModuleThe definition of 'flex-grow' in that specification.	Candidate Recommendation	Initial definition

Browser compatibility

Update compatibility data on GitHub

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`flex-grow`	Chrome Full support 29 Full support 29 Full support 22 Prefixed' Prefixed' Implemented with the vendor prefix: -webkit-	Edge Full support 12 Full support 12 Full support 12 Prefixed' Prefixed' Implemented with the vendor prefix: -webkit-	Firefox Full support 20 Notes' Full support 20 Notes' Notes' Since Firefox 28, multi-line flexbox is supported. No support 18 — 20 Disabled' Disabled' From version 18 until version 20 (exclusive): this feature is behind the `layout.css.flexbox.enabled` preference (needs to be set to `true`). To change preferences in Firefox, visit about:config.	IE Full support 11 Full support 11 Full support 10 Alternate Name' Alternate Name' Uses the non-standard name: `-ms-flex-positive`	Opera Full support 12.1 Full support 12.1 Full support 15 Prefixed' Prefixed' Implemented with the vendor prefix: -webkit-	Safari Full support 9 Full support 9 Full support 6.1 Prefixed' Prefixed' Implemented with the vendor prefix: -webkit-	WebView Android Full support 4.4 Full support 4.4 Full support ≤37 Prefixed' Prefixed' Implemented with the vendor prefix: -webkit-	Chrome Android Full support 29 Full support 29 Full support 25 Prefixed' Prefixed' Implemented with the vendor prefix: -webkit-	Firefox Android Full support 20 Notes' Full support 20 Notes' Notes' Since Firefox 28, multi-line flexbox is supported. No support 18 — 20 Disabled' Disabled' From version 18 until version 20 (exclusive): this feature is behind the `layout.css.flexbox.enabled` preference (needs to be set to `true`). To change preferences in Firefox, visit about:config.	Opera Android Full support 12.1 Full support 12.1 Full support 14 Prefixed' Prefixed' Implemented with the vendor prefix: -webkit-	Safari iOS Full support 9 Full support 9 Full support 7 Prefixed' Prefixed' Implemented with the vendor prefix: -webkit-	Samsung Internet Android Full support 2.0 Full support 2.0 Full support 1.5 Prefixed' Prefixed' Implemented with the vendor prefix: -webkit-
<0 animate Non-standard'	Chrome Full support 49	Edge Full support 79	Firefox Full support 32 Notes' Full support 32 Notes' Notes' Before Firefox 32, Firefox wasn't able to animate values starting or stopping at `0`.	IE No support No	Opera Full support 36	Safari No support No	WebView Android Full support 49	Chrome Android Full support 49	Firefox Android Full support 32 Notes' Full support 32 Notes' Notes' Before Firefox 32, Firefox wasn't able to animate values starting or stopping at `0`.	Opera Android Full support 36	Safari iOS No support No	Samsung Internet Android Full support 5.0

Legend

Full support: Full support
No support: No support
Non-standard. Expect poor cross-browser support.': Non-standard. Expect poor cross-browser support.
See implementation notes.': See implementation notes.
User must explicitly enable this feature.': User must explicitly enable this feature.
Uses a non-standard name.': Uses a non-standard name.
Requires a vendor prefix or different name for use.': Requires a vendor prefix or different name for use.