📅 最后修改于: 2023-12-03 14:59:33.019000 🧑 作者: Mango
Bootstrap Flex Grid is a layout system used to create responsive and mobile-first designs. It is built with flexbox, making it easy to create complex and dynamic layouts with ease. In this article, we will go over the basics of using Bootstrap Flex Grid.
To use Bootstrap Flex Grid, you will need to include the Bootstrap CSS and JavaScript files in your HTML document. You can do this by adding the following code to the <head> section of your HTML file:
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap@5.0.1/dist/css/bootstrap.min.css">
<script src="https://cdn.jsdelivr.net/npm/bootstrap@5.0.1/dist/js/bootstrap.bundle.min.js"></script>
You can also download these files and include them locally in your project.
The Bootstrap Flex Grid system is built around a 12-column grid. To create a row with columns, you will need to use the row and col classes, respectively.
<div class="container">
<div class="row">
<div class="col">Column 1</div>
<div class="col">Column 2</div>
<div class="col">Column 3</div>
</div>
</div>
In the example above, we have a container element with a row element inside. The row has 3 columns, each with the col class. By default, the columns will be evenly spaced across the container.
You can also specify the width of each column by appending a number to the col class. For example, to make a column take up 6 out of the 12 available columns in a row, you would use the col-6 class.
<div class="container">
<div class="row">
<div class="col-6">Column 1</div>
<div class="col-3">Column 2</div>
<div class="col-3">Column 3</div>
</div>
</div>
In this example, Column 1 takes up 6 out of the available 12 columns, while Columns 2 and 3 take up 3 columns each.
Bootstrap Flex Grid makes it easy to create responsive designs that adjust to different screen sizes. To do this, you can use the col classes with responsive breakpoints.
For example, to make a column take up 6 out of the 12 available columns on medium and large screens, but take up all 12 columns on small screens and below, you would use the col-md-6 col-sm-12 classes.
<div class="container">
<div class="row">
<div class="col-md-6 col-sm-12">Column 1</div>
<div class="col-md-3 col-sm-6">Column 2</div>
<div class="col-md-3 col-sm-6">Column 3</div>
</div>
</div>
In this example, Column 1 takes up 6 out of the available 12 columns on medium and large screens, but takes up all 12 columns on small screens and below. Columns 2 and 3 take up 3 columns each on medium and large screens, but take up 6 columns each on small screens and below.
You can also nest columns within other columns to create more complex layouts. To do this, simply add a new row and columns within an existing column.
<div class="container">
<div class="row">
<div class="col">
<div class="row">
<div class="col">Nested Column 1</div>
<div class="col">Nested Column 2</div>
</div>
</div>
<div class="col">Column 2</div>
<div class="col">Column 3</div>
</div>
</div>
In this example, we have a row with 3 columns. The first column contains another row with 2 nested columns.
Bootstrap Flex Grid is a powerful and easy-to-use layout system that can help you create responsive and mobile-first designs. By using the row and col classes, you can create a flexible and dynamic layout with ease.