HTML - The id attribute - W3Schools
The HTML id attribute is used to specify a unique id for an HTML element. You cannot have more than one element with the same id in an HTML document.
HTML id global attribute - MDN Web Docs
Nov 3, 2025 · The id global attribute defines an identifier (ID) that must be unique within the entire document.
HTML Id Attribute - GeeksforGeeks
Jul 11, 2025 · HTML id attribute provides a unique identifier for an element within a document. It allows targeted selection and manipulation of the element through CSS and JavaScript, …
HTML id Attribute - W3docs
In CSS, you must write a hash ( # ) character followed by the id of the element for selecting the element with a specified id. It must have at least one character, and must not contain …
HTML id - W3Schools
The id attribute specifies a unique id for an HTML element (the value must be unique within the HTML document). The id value can be used by CSS and JavaScript to perform certain tasks …
HTML Id (With Examples) - Programiz
An HTML id is an attribute that can be added to an HTML element to give it a unique identifier. It is used in CSS or JavaScript to select and style the element, or to add behavior to it with …
HTML - id Attribute - Online Tutorials Library
HTML id attribute is used to uniquely identify an element within an HTML document, allowing for targeted styling, scripting, and linking. This attribute is frequently used for style, managing …
HTML id Attribute - SitePoint
JavaScript can select an element using its id via the getElementById() function. This method returns the element with the specific id, letting you modify its content or style. Example: When...
HTML ID Attribute (with Examples) - Scientech Easy
Feb 22, 2025 · In simple words, we use id attribute to specify a unique id for an HTML element. For example, if we have two elements of the same name within a web page or style sheet, we …
Element: id property - Web APIs | MDN - MDN Web Docs
Nov 3, 2025 · The id property of the Element interface represents the element's identifier, reflecting the id global attribute. If the id value is not the empty string, it must be unique in a …