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CSS Selector

A CSS selector is a pattern used to select and style HTML elements based on their element name, attributes, class, id, or relationship with other elements. CSS selectors allow you to apply different styles to different elements on a web page, making it easy to control the appearance of your website.

In CSS, a selector is used to target specific HTML elements to apply styles to. There are several types of selectors in CSS, including:

1. Element Selector: This targets a specific type of HTML element. For example, to target all <h1> elements, you would use the following selector:

CSS
h1 {
/* CSS styles */
}

2. ID Selector: This targets a specific HTML element with a unique ID attribute. To target an element with the ID “header”, you would use the following selector:

CSS
#header {
/* CSS styles */
}

Note: ID selectors should only be used once per web page, as ID attributes must be unique.

3. Class Selector: This targets HTML elements with a specific class attribute. To target all elements with the class “button”, you would use the following selecto

CSS
.button {
/* CSS styles */
}

4. Attribute Selector: This targets HTML elements with a specific attribute value. For example, to target all elements with the “href” attribute set to “https://thetechthunder.com“, you would use the following selector:

CSS
a[href="https://thetechthunder.com"] {
/* CSS styles */
}

5. Pseudo-Class Selector: This targets an element in a specific state or condition, such as when it is hovered over or focused. For example, to target a link when it is hovered over, you would use the following selector:

CSS
a:hover {
/* CSS styles */
}

6. Pseudo-Element Selector: This targets a specific part of an element, such as its first line or first letter. For example, to target the first line of a paragraph, you would use the following selector:

CSS
p::first-line {
/* CSS styles */
}

Selectors can also be combined to create more specific selectors. For example, to target all <p> elements with the class “intro”, you would use the following selector:

CSS
p.intro {
/* CSS styles */
}

In summary, selectors in CSS are used to target specific HTML elements to apply styles to. There are several types of selectors, including element, ID, class, attribute, pseudo-class, and pseudo-element selectors, which can be combined to create more specific selectors.

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