Global attributes in HTML are special attributes that can be applied to most HTML elements, regardless of the element's type. These attributes provide additional information or functionality that is not specific to a particular element's behavior. Understanding and using global attributes effectively can enhance accessibility, internationalization, and the overall user experience of web pages. Here are some of the key global attributes in HTML:

1. class

• Description: Specifies one or more classnames for an element which can be used by CSS and JavaScript to perform certain tasks for elements with the specified class names.

• Example: <div class="container"></div>

2. id

• Description: Assigns a unique identifier to an element. The value of this attribute must be unique within the HTML document.

• Example: <section id="header"></section>

3. style

• Description: Contains CSS styling declarations to be applied to the element.

• Example: <p style="color: red;">This is a red paragraph.</p>

4. title

• Description: Provides additional information about an element. Often displayed as a tooltip when the mouse hovers over the element.

• Example: <abbr title="Hypertext Markup Language">HTML</abbr>

5. data-*

• Description: Allows us to store custom data private to the page or application. The can be replaced by any name following the production rule of XML names with no uppercase or colon characters (data- attributes are case-insensitive).

• Example: <article data-article-id="12345" data-author="John Doe"></article>

6. lang

• Description: Specifies the language of the element’s content. Useful for search engines and screen readers.

• Example: <p lang="en">Hello World!</p>

7. tabindex

• Description: Sets the tab order of an element when the "tab" key is used for navigating.

• Example: <input tabindex="1">

8. contenteditable

• Description: Indicates whether the content of the element is editable or not.

• Example: <div contenteditable="true">You can edit this text.</div>

9. hidden

• Description: Indicates that the element is not yet, or is no longer, relevant.

• Example: <div hidden>Hidden information</div>

10. draggable

• Description: Specifies whether an element is draggable or not.

• Example: <img src="logo.png" draggable="true">

11. spellcheck

• Description: Specifies whether the element is to have its spelling and grammar checked or not.

• Example: <textarea spellcheck="false"></textarea>

12. accesskey

• Description: Specifies a shortcut key to activate/focus an element.

• Example: <button accesskey="h">Click me</button>

13. dir

• Description: Specifies the text direction for the content in an element.

• Example: <div dir="rtl">This text is right-to-left.</div>

14. translate

• Description: Specifies whether the content of an element should be translated or not.

• Example: <p translate="no">Hello World!</p>

Global attributes are powerful tools that can significantly impact the behavior and presentation of web elements. Proper use of these attributes can improve the accessibility, functionality, and user experience of web pages. Learn HTML completely with the full stack developer courses!