Use the id attribute to manipulate text with JavaScript:
More "Try it Yourself" examples below.
The id attribute specifies a unique id for an HTML element (the value must be unique within the HTML document).
The id attribute is most used to point to a style in a style sheet, and by JavaScript (via the HTML DOM) to manipulate the element with the specific id.
Attribute | |||||
---|---|---|---|---|---|
id | Yes | Yes | Yes | Yes | Yes |
In HTML5, the id attribute can be used on any HTML element (it will validate on any HTML element. However, it is not necessarily useful).
In HTML 4.01, the id attribute cannot be used with: <base>, <head>, <html>, <meta>, <param>, <script>, <style>, and <title>.
Note: HTML 4.01 has greater restrictions on the content of id values (for example; in HTML 4.01 id values cannot start with a number).
Value | Description |
---|---|
id | Specifies a unique id for the element.
Naming rules:
|
Use the id attribute to link to an element with a specified id within a page:
Use the id attribute to style text with CSS:
HTML Tutorial: HTML Attributes
CSS Tutorial: CSS Selectors
CSS Reference: CSS #id Selector
HTML DOM Reference: HTML DOM getElementById() Method
HTML DOM Reference: HTML DOM id Property
HTML DOM Reference: HTML DOM Style Object