CSS | flex-basis Property

Last Updated : 01 Aug, 2022

The flex-basis property in CSS is used to specify the initial size of the flexible item. The flex property is not used if the element is not flexible item.

Syntax:

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

Default Value:

auto

Property Values:

number: It is a length unit that define the initial length of that item.
auto: It is the default value, if the length is not specified the length will be according to it’s content.
initial: It sets the property to it’s default value.
inherit: It specifies that a property should inherit its value from its parent element.

Example 1:

html

<!DOCTYPE html>
<html>
     
<head>
    <style>
        .Geeks {
            width: 385px;
            height: 70px;
            display: flex;
        }
         
        .Geeks div {
            flex-grow: 0;
            flex-shrink: 0;
            flex-basis: 80px;
             
            /* For Safari 6.1 and above browsers */
            -webkit-flex-grow: 0;
            -webkit-flex-shrink: 0;
            -webkit-flex-basis: 80px;
        }
         
        .Geeks div:nth-of-type(2) {
            flex-basis: 50%;
        }
        .Geeks div:nth-of-type(3) {
            flex-basis: auto;
        }
        .Geeks div:nth-of-type(4) {
            flex-basis: initial;
        }
        .Geeks div:nth-of-type(5) {
            flex-basis: inherit;
        }
    </style>
</head>
 
<body>
    <center>
         
        <h1>
            The flex-basis Property
        </h1>
         
        <div class = "Geeks">
             
            <div style = "background-color:green;">
                number 80px
            </div>
             
            <div style = "background-color:lightgreen;">
                percentage
            </div>
             
            <div style = "background-color:green;">
                auto
            </div>
             
            <div style = "background-color:lightgreen;">
                initial
            </div>
             
            <div style = "background-color:green;">
                inherit
            </div>
        </div>
         
    </center>
</body>
 
</html>                   

Output:

Example 2:

html

<!DOCTYPE html>
<html>
     
<head>
    <style>
        .Geeks {
            width: 560px;
            height: 100px;
            border: 1px solid black;
            display: flex;
        }
         
        .Geeks div {
            flex-grow: 0;
            flex-shrink: 0;
            flex-basis: 80px;
        }
        .Geeks div:nth-of-type(2) {
            flex-basis: 200px;
        }
        .Geeks div:nth-of-type(5) {
            flex-basis: 120px;
        }
        h3{
            color:Green;
        }
    </style>
</head>
 
<body>
    <center>
         
        <h1>
            The flex-basis Property
        </h1>
         
        <div class = "Geeks">
            <div style="background-color:green">
                80px
            </div>
             
            <div style="background-color:lightgreen">
                GeeksforGeeks <br>200px
            </div>
             
            <div style="background-color:green">
                80px
            </div>
             
            <div style="background-color:lightgreen">
                80px
            </div>
             
            <div style="background-color:green">
                120px
            </div>
        </div>
    </center>
</body>
 
</html>                   

Output:

Supported Browsers: The browser supported by flex-basis property are listed below:

Google Chrome 29.0
Edge 12
Internet Explorer 11.0
Mozilla Firefox 22.0
Safari 9.0
Opera 12.1

My Personal Notes

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