Front-end Tutorials

Front-end Tutorials

HTMLCSSSassJavaScriptReactJS
CMS Tutorials

CMS Tutorials

WordPress
Tutorials expand

CSS Basic

CSS #id Selector

Posted in CSS Tutorial
Updated on Oct 27, 2024
By Mari Selvan
πŸ‘οΈ 18 - Views
⏳ 4 mins
πŸ’¬ 1 Comment
CSS #id Selector

Photo Credit to CodeToFun

πŸ™‹ Introduction

The CSS #id selector is used to style an element based on its unique id attribute. IDs are meant to be unique within a webpage, and this selector allows you to target a specific element by its id value. This provides a precise way to apply styles to a single element, distinguishing it from other elements in the document.

πŸ’‘ Syntax

The signature of the #id Selector is as follows:

Syntax
Copied
Copy To Clipboard
#elementID {
    /* CSS properties */
}
  • #elementID refers to the id of the HTML element you want to style.
  • In CSS, the id selector is prefixed with a # followed by the id name.

πŸ“ Example

Here is an example of how to use the CSS #id selector:

☠️ HTML

HTML
Copied
Copy To Clipboard
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>CSS #id Selector Example</title>
    <link rel="stylesheet" href="styles.css">
</head>
<body>
    <h1 id="main-title">Welcome to My Blog</h1>
    <p>This is a paragraph about the blog.</p>
    <p id="highlight">This paragraph is uniquely styled.</p>
</body>
</html>

🎨 CSS

CSS
Copied
Copy To Clipboard
/* Styling the element with id "main-title" */
#main-title {
    font-size: 36px;
    color: darkblue;
    text-align: center;
}

/* Styling the element with id "highlight" */
#highlight {
    background-color: yellow;
    font-weight: bold;
}

In this example:

  • The <h1> element with the id="main-title" is styled with a larger font size, dark blue color, and centered alignment.
  • The <p> element with id="highlight" is styled with a yellow background and bold font.

πŸ’¬ Usage Tips

  • Uniqueness: An id should be unique within a document. Do not assign the same id to multiple elements as it can cause unpredictable results.
  • Specificity: The #id selector has a higher specificity compared to class selectors (.class). It overrides styles applied by less specific selectors like element selectors (element) or class selectors (.class).
  • Avoid overusing id: It's best to reserve the id selector for elements that require unique styles or behaviors, like #header or #footer. For reusable styles, use classes (.class).

⚠️ Common Pitfalls

  • Multiple elements with the same id: The id must be unique in an HTML document. If more than one element shares the same id, browsers may not apply styles correctly.
  • Over-relying on id: While the #id selector is powerful, relying too much on it can reduce flexibility in your CSS. For styles that may apply to multiple elements, prefer using classes.
  • Specificity issues: Since #id has high specificity, it can sometimes conflict with other styles, especially if you are using complex CSS rules. Be mindful of this to avoid unexpected behavior.

πŸŽ‰ Conclusion

The CSS #id selector is an essential tool for targeting and styling unique elements on a webpage. While it’s powerful due to its high specificity, it should be used with care to maintain clean, maintainable CSS.

By understanding how to use the #id selector effectively, you can create precise and impactful styles for specific elements on your page.

πŸ‘¨β€πŸ’» Join our Community:

To get interesting news and instant updates on Front-End, Back-End, CMS and other Frameworks. Please Join the Telegram Channel:

Author

author
πŸ‘‹ Hey, I'm Mari Selvan

For over eight years, I worked as a full-stack web developer. Now, I have chosen my profession as a full-time blogger at codetofun.com.

Buy me a coffee to make codetofun.com free for everyone.

Buy me a Coffee

Share Your Findings to All

Subscribe
Notify of
guest
1 Comment
Oldest
Newest Most Voted
Inline Feedbacks
View all comments
We make use of cookies to improve our user experience. By using this website, you agree with our Cookies Policy
AgreeCookie Policy