Understand the five classic CSS layout frameworks, as well as their detailed analysis and use

What are the commonly used CSS layout frameworks? A detailed explanation of the five classic frameworks requires specific code examples

In modern web development, the CSS layout framework plays a vital role. They help developers easily implement responsive design, flexible web layouts, and good maintainability. This article will explain in detail the five classic CSS layout frameworks, namely Bootstrap, Foundation, Semantic UI, Pure and Bulma, and provide specific code examples.

1. Bootstrap (https://getbootstrap.com/):
   Bootstrap is one of the most popular CSS layout frameworks currently. It provides an extensive set of CSS and JavaScript components for building responsive, mobile-first web pages. Here is a simple example showing how to create a simple two-column layout using the Bootstrap grid system:

<div class="container">
  <div class="row">
    <div class="col-md-6">左侧列</div>
    <div class="col-md-6">右侧列</div>
  </div>
</div>

2. Foundation (https://foundation.zurb.com/):
   Foundation is another popular CSS framework that is widely used to build modern, customizable web pages. It provides a rich set of CSS and JavaScript components with a high degree of flexibility and scalability. Here is a simple example showing how to use Foundation to create a simple two-column layout of equal height:

<div class="row">
  <div class="columns">左侧列</div>
  <div class="columns">右侧列</div>
</div>

3. Semantic UI（https://semantic-ui.com/）:
   Semantic UI is a modern and intuitive CSS framework that provides rich semantic components and powerful customizability. Here is a simple example that shows how to use Semantic UI to create a web page with a two-column equal-height layout:

<div class="ui grid">
  <div class="column">左侧列</div>
  <div class="column">右侧列</div>
</div>

4. Pure (https://purecss.io/):
   Pure is a minimalist, responsive CSS framework developed and maintained by Yahoo. It mainly focuses on providing lightweight, fast and modular CSS layout solutions. Here's a simple example showing how to create a simple two-column layout using Pure:

<div class="pure-g">
  <div class="pure-u-1-2">左侧列</div>
  <div class="pure-u-1-2">右侧列</div>
</div>

5. Bulma (https://bulma.io/):
   Bulma is A modern, Flexbox-based CSS framework with an intuitive API and powerful customizability. The following is a simple example that shows how to use Bulma to create a web page with a two-column layout:

<div class="columns">
  <div class="column">左侧列</div>
  <div class="column">右侧列</div>
</div>

Through the above example, we can see that these five classic CSS layout frameworks provide Simple and intuitive CSS classes help developers quickly build various layouts. Using these frameworks, developers can easily create responsive designs, flexible web layouts, and reduce repetitive CSS writing work. Whether you are a newbie or an experienced developer, these frameworks are excellent choices that can improve your web development efficiency.

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