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Most people do not understand the knowledge points of this article "BootStrap Auxiliary Class and responsive tools", so the editor summarizes the following contents, detailed content, clear steps, and has a certain reference value. I hope you can get something after reading this article. Let's take a look at this "BootStrap Auxiliary Group and responsive tools how to use" article.

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The default location is the upper-right corner of the parent element

Small triangle icon. Caret

Fast floating. Pull-left and .pull-right

I am the word.

I am the word.

This float is actually float, but it uses! important to strengthen the priority.

Block centered center-block

I am the word.

Clean up floating clearfix

I am the word.

I am the word.

This p can be placed in front of the floating block that needs to be cleaned.

Show (.show) and hide (.hidden)

I am the word.

I am the word.

In fact, display:block or none added one! Important strengthens priorities

Responsive tool

Ultra-small screen

Mobile phone (

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