The HTML DOM boxSizing property is used to specify the way an element’s total width and height is calculated. It can have "border-box" or "content-box" as values.
Following is the syntax for −
Setting the boxSizing property −
object.style.boxSizing = "content-box|border-box|initial|inherit"
The property values are explained as follows −
| Value | Description |
|---|---|
| content-box | This is the default value and any padding or border width will be added to the content box final width. |
| border-box | In border-box the width specified stays intact and the content box shrinks if any padding or border is applied to it. |
| initial | For setting this property to initial value. |
| inherit | To inherit the parent property value |
Let us look at an example for the boxSizing property −
Example
<!DOCTYPE html>
<html>
<head>
<style>
#DIV1{
height:100px;
width: 350px;
border: 30px solid lightpink;
box-sizing: border-box;
}
</style>
<script>
function changeBoxSizing(){
document.getElementById("DIV1").style.boxSizing="content-box";
document.getElementById("Sample").innerHTML="The box sizing is now changed to content-box ";
}
</script>
</head>
<body>
<div id="DIV1">
THIS IS SAMPLE TEXT INSIDE DIV.HELLO WORLD DIV.
</div>
<p>Change the above div box-sizing property by clicking the below button</p>
<button onclick="changeBoxSizing()">Change Box Sizing</button>
<p id="Sample"></p>
</body>
</html>Output
On clicking the “Change Box Sizing” button −
