HTML Tutorial

HTML ID'S

HTML ID

In HTML, the id attribute is used to assign a unique identifier to an element. An id should be unique within the page, meaning no two elements should share the same id value. It is often used for styling specific elements or targeting them with JavaScript functions.

When to Use ID?

Use the id attribute when you need to uniquely identify an element for styling, scripting, or linking. Since an id must be unique, it's ideal for selecting individual elements that you want to style or manipulate independently from others.

Syntax

<div id="unique-id">Content here</div>

Example

<!DOCTYPE html>
<html>
  <head>
    <title>ID Example</title>
    <style>
      #special-text {
        color: green;
        font-size: 20px;
        font-weight: bold;
      }
    </style>
  </head>
  <body>

    <p id="special-text">This is a unique paragraph with the "special-text" ID.</p>
    <p>This paragraph does not have an ID and will follow the default styling.</p>

  </body>
</html>

Best Practices

Ensure each id is unique within the page to avoid conflicts.
Use id to target specific elements in CSS or JavaScript.
Follow a clear naming convention for id values (e.g., header-main, footer-info).
Be careful not to overuse id for general styling. For multiple elements, consider using classes.

Conclusion

The id attribute is an essential part of HTML, used for uniquely identifying elements on a page. It's primarily used for applying specific styles or manipulating elements with JavaScript.

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