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This article mainly introduces the ID selector and class selector how to use the relevant knowledge, the content is detailed and easy to understand, the operation is simple and fast, has a certain reference value, I believe that everyone after reading this ID selector and class selector how to use the article will have a harvest, let's take a look.

ID selector

Id uniquely identifies an element, can only appear once in a file, and can find specific elements with great precision.

The ID selector is preceded by a # sign, which adds styles to the HTML document through the ID selector in CSS

Example:

# demo {

Width:100px

Height:100px

Background:pink

Text-align:center

Line-height:100px

}

ID selector

Effect picture:

Class selector

The class selector allows styles to be specified in a way independent of document elements, which can be used alone or in combination with other elements

The class selector is preceded by a "." Number

Example

.demo {

Width:100px

Height:100px

Background:pink

Text-align:center

Line-height:100px

}

Class selector

This is the end of the article on "how to use ID selectors and class selectors". Thank you for reading! I believe you all have a certain understanding of the knowledge of "how to use ID selector and class selector". If you want to learn more, you are welcome to follow the industry information channel.

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