The id attribute specifies a unique id for an HTML element. The value of the id attribute must be unique within the HTML document. The id attribute is used to point to a specific style declaration in a style sheet.

Apr 10, 2025 · The purpose of the ID attribute is to identify a single element when linking (using a fragment identifier), scripting, or styling (with CSS). Elements with ID attributes are available as global properties.

Apr 15, 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, facilitating specific styling and functionality. In CSS, the id attribute is used using the # symbol followed by id. quotes are not mandatory in tag=” ” in all cases.

Sep 16, 2008 · For HTML 4, the answer is technically: ID and NAME tokens must begin with a letter ( [A-Za-z]) and may be followed by any number of letters, digits ( [0-9]), hyphens ("-"), underscores ("_"), colons (":"), and periods (".").

Feb 4, 2023 · Used to specify a unique id for an HTML element, which cannot be shared across multiple elements within the same HTML document.

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 JavaScript.

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 whitespace (tabs, spaces, etc.). In HTML5, the id attribute can be used for any HTML element.

Dec 24, 2024 · Using the id attribute is straightforward. Simply add id="your_unique_id" to the opening tag of the HTML element. Here's a basic example: In this example, the h1 heading has an id of main-heading, and the paragraph has an id of intro-paragraph. These IDs can now be targeted with CSS and JavaScript.

Dec 15, 2024 · The id attribute assigns a unique identifier to an HTML element. Unlike classes, which can be reused across multiple elements, an id must be unique within a page. This uniqueness makes the id attribute ideal for targeting specific elements.

In Html, an id attribute is used to define an id for an element. The ID attribute can be used to distinguish between elements with the same name. The id attribute serves as a unique identifier.