CSS font-size Property
CSS font-size Property
CSS font-size property sets the size of the font.
Example
HTML Online Editor
<!DOCTYPE html>
<html lang="en-US">
<head>
<style>
#point{
font-size: 14px;
}
#point1{
font-size: large;
}
#point2{
font-size: 150%;
}
</style>
</head>
<body>
<h1>CSS font-size Property</h1>
<p id="point">font-size of this paragraph is 14px.</p>
<p id="point1">font-size of this paragraph is large.</p>
<p id="point2">font-size of this paragraph is 150%.</p>
</body>
</html>
Syntax
Using CSS
element{
font-size: 25px;
}
Using Javascript
object.size.fontSize="25px";
Animatable
Yes, font-size property is animatable. CSS Animatable Properties Reference.
Default Value
Default value for CSS font-size property is medium.
Property Value
The following table provides a list of values for CSS font-size property.
| Value | Explanation |
|---|---|
|
xx-small x-small small medium large x-large xx-large | Specifies the absolute-size keywords, based on the user's default font size. |
| large smaller | Specifies the relative-size keywords. The font will be larger or smaller relative to the parent element's font size. |
| length | Allows you to define the size of the font in any CSS length unit. |
| % | Sets the font-size to a percent of the parent element's font size. |
Using JavaScript
In the following example, we will demonstrate how to change the CSS font-size property of an element using JavaScript.
Example
HTML Online Editor
<!DOCTYPE html>
<html lang="en-US">
<body>
<h1>CSS font-size Property</h1>
<button onclick="myFunction()">Click Me</button>
<script>
var x = document.getElementsByTagName("h1")[0];
function myFunction(){
x.style.fontSize = "40px";
}
</script>
</body>
</html>
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