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Bootstrap 4 Tutorial

Bootstrap 4 is the newest version of Bootstrap, which is the most popular HTML, CSS, and JavaScript framework for developing responsive, mobile-first websites.

Bootstrap 4 is completely free to download and use!

Start learning Bootstrap 4 now »

了解Bootstrap 4


来试试吧 示例

This Bootstrap 4 tutorial contains hundreds of Bootstrap 4 examples.

With our online editor, you can edit the code, and click on a button to view the result.

Responsive Bootstrap Page

Bootstrap 4 Example

<div class="jumbotron text-center">
  <h1>My First Bootstrap Page</h1>
  <p>Resize this responsive page to see the effect!</p>
</div>

<div class="container">
  <div class="row">
    <div class="col-sm-4">
      <h3>Column 1</h3>
      <p>Lorem ipsum dolor..</p>
    </div>
    <div class="col-sm-4">
      <h3>Column 2</h3>
      <p>Lorem ipsum dolor..</p>
    </div>
    <div class="col-sm-4">
      <h3>Column 3</h3>
      <p>Lorem ipsum dolor..</p>
    </div>
  </div>
</div>
来试试吧 »

Click on the "来试试吧" button to see how it works.



Bootstrap 3 vs. Bootstrap 4

Bootstrap 4 is the newest version of Bootstrap; with new components, faster stylesheet and more responsiveness.

Bootstrap 4 supports the latest, stable releases of all major browsers and platforms. However, Internet Explorer 9 and down is not supported.

If you require IE8-9 support, use Bootstrap 3. It is the most stable version of Bootstrap, and it is still supported by the team for critical bugfixes and documentation changes. However, new features will NOT be added to it.

Go To Bootstrap 3 »

Bootstrap 4 Basic Template

We have created a responsive starter template with Bootstrap 4. You are free to modify, save, share, and use it in your projects:


Bootstrap 参考

A complete list of all Bootstrap 4 CSS classes with description and examples:

If you want to do more with Bootstrap components, see our complete Bootstrap 4 JavaScript/jQuery reference - all with "来试试吧" examples:


Did You Know?

W3.CSS is an excellent alternative to Bootstrap 4.

W3.CSS is smaller, faster, and easier to use.

If you want to learn W3.CSS, go to our W3.CSS Tutorial.




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