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The min-height Property in CSS
We can define a fixed min-height for an element?s content box using CSS min-height property which does not allows the element?s content box to be smaller even if height is lesser than min-height.
Syntax
The syntax of CSS min-height property is as follows −
Selector {
min-height: /*value*/
}
The value can be −
length − Set the min height in px, cm, em, etc.
% − Set the min height in %
Example
In this example, we have set the minimum height for the <p> element −
p.demo {
min-height: 120px;
background-color: green;
}
Let us see the example −
<!DOCTYPE html>
<html>
<head>
<style>
p {
color: white;
background-color: blue;
}
p.demo {
min-height: 120px;
background-color: green;
}
</style>
</head>
<body>
<h1>Demo Heading</h1>
<h2>Learn Java</h2>
<p>This is a demo text.</p>
<h2>mLearn Python</h2>
<p class="demo">This is a demo text.</p>
<h2>mLearn Python</h2>
<p>This is a demo text.</p>
</body>
</html>
Example
Let?s see another example for the CSS min-height property. When the button is clicked, the minim height is set to 100px for the content div −
<script>
function add() {
document.querySelector('#contentDiv').style.minHeight = "100px";
}
</script>
Let us see the example −
<!DOCTYPE html>
<html>
<head>
<title>CSS min-height Property</title>
<style>
* {
padding: 2px;
margin:5px;
}
button {
border-radius: 10px;
}
#containerDiv {
width:70%;
margin: 0 auto;
padding:20px;
background-image: linear-gradient(135deg, #dc3545 0%, #9599E2 100%);
text-align: center;
border-radius: 10px;
}
#contentDiv{
min-height:150px;
}
</style>
</head>
<body>
<div id="containerDiv">
<div id="contentDiv">
This is paragraph 1 with some dummy text. This is paragraph 1 with some dummy text.
This is paragraph 1 with some dummy text. This is paragraph 1 with some dummy text.
This is paragraph 1 with some dummy text. This is paragraph 1 with some dummy text.
</div>
<button onclick="add()" class="btn">Set minHeight</button>
</div>
<script>
function add() {
document.querySelector('#contentDiv').style.minHeight = "100px";
}
</script>
</body>
</html>
Example
Let?s see another example for the CSS min-height property. When the button is clicked, the minim height is set for the 1st child div −
<script>
function add() {
document.querySelector('#contentDiv1').style.minHeight = "95px";
}
</script>
Let us see the example −
<!DOCTYPE html>
<html>
<head>
<title>CSS min-height Property</title>
<style>
* {
padding: 2px;
margin:5px;
}
button {
border-radius: 10px;
}
#containerDiv {
width:70%;
margin: 0 auto;
padding:20px;
background-image: linear-gradient(135deg, #dc3545 0%, #9599E2 100%);
text-align: center;
border-radius: 10px;
}
#contentDiv1, #contentDiv2{
width:50%;
border: 2px solid black;
margin: 0 auto;
}
</style>
</head>
<body>
<div id="containerDiv">
<div id="contentDiv1">
This is paragraph 1 with some dummy text. This is paragraph 1 with some dummy text.
</div>
<div id="contentDiv2">
This is paragraph 1 with some dummy text.
This is paragraph 1 with some dummy text.
This is paragraph 1 with some dummy.
</div>
<button onclick="add()" class="btn">Set minHeight</button>
</div>
<script>
function add() {
document.querySelector('#contentDiv1').style.minHeight = "95px";
}
</script>
</body>
</html>
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