CSS flex-grow Property

Let the second flex-item grow three times wider than the rest:

div:nth-of-type(1) {flex-grow: 1;}
div:nth-of-type(2) {flex-grow: 3;}
div:nth-of-type(3) {flex-grow: 1;}

Definition and Usage

The flex-grow property specifies how much the item will grow relative to the rest of the flexible items inside the same container.

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

Default value:	0
Inherited:	no
Animatable:	yes. Read about animatable Try it
Version:	CSS3
JavaScript syntax:	object.style.flexGrow="5" Try it

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.

Property
flex-grow	29.0 21.0 -webkit-	11.0	28.0 18.0 -moz-	9.0 6.1 -webkit-	17.0

flex-grow: number|initial|inherit;

Value	Description	Play it
number	A number specifying how much the item will grow relative to the rest of the flexible items. Default value is 0	Demo ❯
initial	Sets this property to its default value. Read about initial
inherit	Inherits this property from its parent element. Read about inherit

CSS Reference: flex property

HTML DOM reference: flexGrow property