Style fontSize Attribute

Definition and Usage

fontSize Sets or returns the font size of the text.

See Also:

CSS Tutorial:CSS Font

CSS Reference Manual:font-size Attribute

HTML DOM Reference Manual:font Property

Instance

Example 1

Sets the font size of the <p> element to "xx-large":

document.getElementById("myP").style.fontSize = "xx-large";

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Example 2

Demonstration of possible values:

var listValue = selectTag.options[selectTag.selectedIndex].text;
document.getElementById("myP").style.fontSize = listValue;

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Example 3

Returns the font size of the <p> element:

alert(document.getElementById("myP").style.fontSize);

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Syntax

Return fontSize property:

object.style.fontSize

Set fontSize property:

object.style.fontSize = "value|initial|inherit"

Attribute Value

Value Description
  • xx-small
  • x-small
  • small
  • medium
  • large
  • x-large
  • xx-large
 Sets the font size to a different fixed size, from xx-small to xx-large.
smaller Decreases the font size by a relative unit.
larger Increases the font size by a relative unit.
length Define the font size with a length unit.
% Sets the font size to a percentage of the parent element's font size.
initial Sets this property to its default value. See initial.
inherit Inherits this property from its parent element. See inherit.

Technical Details

Default value: medium
Return value: A string that represents the font size of the element's text.
CSS Version: CSS1

Browser Support

Chrome Edge Firefox Safari Opera
Chrome Edge Firefox Safari Opera
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