Javascript Reference - HTML DOM Style flexBasis Property

The flexBasis property gets and sets the initial length of a flexible item.

Browser Support


`flexBasis`	Yes	10.0	Yes	Yes (WebkitFlexBasis)	Yes

Syntax

Return the flexBasis property:

var v = object.style.flexBasis

Set the flexBasis property:

object.style.flexBasis='number|auto|initial|inherit'

Property Values

number: A length unit or percentage sets the initial length of the flexible item(s)
auto: Default value. The length is equal to the length of the flexible item.
initial: sets to default value
inherit: Inherits this property from its parent element

Technical Details

Default Value:	auto
Return Value:	A string representing the flex-basis property
CSS Version	CSS3

Example

The following code shows how to set the initial length of a flex-item to 200 pixels.


<!DOCTYPE html>
<html>
<head>
<style>
#main {<!--  w  w  w  .  jav  a2 s  .c om-->
    width: 350px;
    height: 100px;
    border: 1px solid #c3c3c3;
    display: -webkit-flex; /* Safari */
    display: flex;
}

#main div {
    -webkit-flex-grow: 0; /* Safari 6.1+ */
    -webkit-flex-shrink: 0; /* Safari 6.1+ */
    -webkit-flex-basis: 40px; /* Safari 6.1+ */
    flex-grow: 0;
    flex-shrink: 0;
    flex-basis: 50px;
}
</style>
</head>
<body>

<div id="main">
  <div style="background-color:coral;">A</div>
  <div style="background-color:lightblue;" id="myDIV">B</div>
</div>

<button onclick="myFunction()">test</button>
<script>
function myFunction() {
    document.getElementById("myDIV").style.WebkitFlexBasis = "200px"; // Safari 6.1+
    document.getElementById("myDIV").style.flexBasis = "200px";
}
</script>

</body>
</html>

The code above is rendered as follows: