How do you select child elements, pseudo elements, and classes in CSS?

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To select child elements, pseudo elements, and classes in CSS, you can use various selectors:

  1. Child Elements: To select child elements, you can use the “>” symbol. For example, if you have a <div> element with a class of “parent” and you want to select all the <p> elements inside it, you can use the following CSS selector:
.parent > p {
/* CSS styles */
}

  1. Pseudo Elements: Pseudo elements are used to style specific parts of an element. They are denoted by the “::” notation. For example, if you want to style the first letter of a paragraph, you can use the following CSS selector:
p::first-letter {
/* CSS styles */
}

  1. Classes: To select elements with a specific class, you can use the “.” symbol followed by the class name. For example, if you have a <div> element with a class of “my-class” and you want to select it, you can use the following CSS selector:
.my-class {
/* CSS styles */
}

Now, if you want to provide a solution using JavaScript and HTML format, you can use the following code:

<!DOCTYPE html>
<html>
<head>
<style>
/* CSS styles for child elements, pseudo elements, and classes */
.parent > p {
/* CSS styles for child elements */
}
p::first-letter {
/* CSS styles for pseudo elements */
}
.my-class {
/* CSS styles for classes */
}
</style>
</head>
<body>
<div class="parent">
<p>Child element</p>
</div>
<p>Paragraph with pseudo element</p>
<div class="my-class">
<p>Element with class</p>
</div>
</body>
</html>

In the above HTML code, the CSS styles for child elements, pseudo elements, and classes are defined within the <style> tags. The respective selectors are used to target the desired elements.