What are the global attributes of html

html's global attributes refer to attributes that apply to all HTML elements. They can be applied to any HTML tag to provide common functions and behaviors. They can define class names, unique identifiers, styles, and additional information for elements. Language, custom data, tab order, shortcut keys, editability and draggability, etc. These global attributes make HTML more flexible and scalable to meet various needs and application scenarios.

# Operating system for this tutorial: Windows 10 system, Dell G3 computer.

HTML global attributes refer to attributes that apply to all HTML elements. These attributes can be applied to any HTML tag to provide common functionality and behavior. Global attributes are not specific to a certain tag, but apply to the entire HTML document. Some commonly used HTML global attributes will be introduced in detail below.

class: The class attribute is used to define one or more class names for HTML elements. Class names can be used in CSS style selectors, as well as in JavaScript to operate and access elements. Through the class attribute, we can assign the same style or behavior to different elements.

id: The id attribute defines a unique identifier for an HTML element. The id is globally unique, and each element in the HTML document should have a different id. Through the id attribute, we can select a specific element in CSS styles and operate and access it in JavaScript.

style: The style attribute is used to define inline styles for HTML elements. Through the style attribute, we can define the style of an element directly in the HTML tag without using an external CSS file or an internal style sheet. The value of the style attribute is a set of key-value pairs of CSS properties and values.

title: The title attribute is used to provide additional information for HTML elements. When a user hovers over an element with a title attribute, the browser displays the value of the title attribute as a tooltip. This is useful for providing a description or additional information about an element.

lang: The lang attribute is used to define the language of HTML elements. By specifying the appropriate language code, you can ensure that screen readers and translation tools understand and process the text correctly. This is very important for internationalization and multilingual websites.

data-*: The data-* attribute is used to add custom data to HTML elements. This custom data can be manipulated and accessed using JavaScript. The naming of data-* attributes needs to start with "data-", and can be followed by any customized name.

tabindex: The tabindex attribute is used to define the order of HTML elements when traversing the Tab key. By setting different tabindex values, you can adjust the focus order of elements during tab key traversal. This is useful for creating highly accessible web pages and forms.

accesskey: The accesskey attribute is used to define shortcut keys for HTML elements. By setting the accesskey attribute, we can assign a shortcut key on the keyboard so that the user can access the element by pressing that shortcut key. This is important to improve the accessibility and usability of web pages.

contenteditable: The contenteditable attribute is used to specify whether the HTML element is editable. By setting the contenteditable attribute to "true" we can allow the user to edit the content of the element. This is useful for creating editable web pages and rich text editors.

draggable: The draggable attribute is used to specify whether an HTML element can be dragged. By setting the draggable attribute to "true", you can allow the user to perform some actions by dragging the element. This is useful for creating drag-and-drop functionality or implementing custom dragging behavior.

To summarize, HTML global attributes are a set of attributes that apply to all HTML elements and provide common functionality and behavior. With these attributes, we can define class names, unique identifiers, styles, additional information languages, custom data, tab order, shortcut keys, editability and draggability, etc. for elements. These global attributes make HTML more flexible and scalable to meet various needs and application scenarios.

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