A CSS selector selects the HTML element(s) you want to style. CSS selectors are used to find (or select) HTML elements based on their element name, id, class, attribute, and more.
The element selector selects HTML elements based on the element name.
The id selector uses the id attribute of an HTML element to select a specific element. The id of an element is unique within a page, so the id selector is used to select one unique element.
To select an element with a specific id, write a hash (#) character, followed by the id of the element.
The class selector selects HTML elements with a specific class attribute. To select elements with a specific class, write a period (.) character, followed by the class name.
<!DOCTYPE html>
<html>
<head>
<style>
/* Element selector */
p {
text-align: center;
color: red;
}
/* ID selector */
#para1 {
text-align: center;
color: blue;
}
/* Class selector */
.center {
text-align: center;
color: green;
}
</style>
</head>
<body>
<p>Every paragraph will be red.</p>
<p id="para1">This paragraph is blue!</p>
<p class="center">This paragraph is green!</p>
</body>
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