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CSS flex-basis



The CSS flex-basis property is used to set the initial length of flex items in flex container. For example:

HTML with CSS Code
<!DOCTYPE html>
<html>
<head>
   <style>
      .container{display: flex; background-color: brown;}
      .container > div{border: 1px solid coral; padding: 12px; color: wheat;
         flex-basis: 50px;}
   </style>
</head>
<body>

   <div class="container">
      <div>A</div>
      <div>B</div>
      <div>C</div>
      <div>D</div>
   </div>
   
</body>
</html>
Output
A
B
C
D

CSS flex-basis Syntax

The syntax of flex-basis property in CSS, is:

flex-basis: x;

The value of x should be any of the following:

CSS flex-basis to Change Initial Length of Particular Flex Item

HTML with CSS Code
<!DOCTYPE html>
<html>
<head>
   <style>
      .container{display: flex; background-color: brown;}
      .container > div{border: 1px solid coral; padding: 12px; color: wheat;}
      #secondiv{flex-basis: 120px;}
   </style>
</head>
<body>

   <div class="container">
      <div>A</div>
      <div id="secondiv">B</div>
      <div>C</div>
      <div>D</div>
   </div>
   
</body>
</html>
Output
A
B
C
D

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