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Bootstrap 4 - Layout


Bootstrap 4 uses container classes to wrap the page's contents. It contains two container classes

  • .container − It represents a fixed width container.

  • .container-fluid − It represents a full width container.

Bootstrap requires a containing element to wrap elements and contain its grid system (more on the grid system next).

fixed Container

A fixed container is a (responsive) fixed width container. As you resize your browser, its width remains intact, until it passes a certain breakpoint (as specified by you — more on that next), at which time it will resize to the new width for that break point.
<div class = "container">
   ...
</div>

Example

The below example specifies a simple web page with fixed width container
<html lang="en">
    <head>
        <!-- Meta tags -->
        <meta charset="utf-8">
        <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
        <!-- Bootstrap CSS -->
        <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.css" integrity="sha384-MCw98/SFnGE8fJT3GXwEOngsV7Zt27NXFoaoApmYm81iuXoPkFOJwJ8ERdknLPMO" crossorigin="anonymous">
        <title>Bootstrap 4 Example</title>
    <style>
        .container {
        background: #a52c644a;
        text-align: center;
        padding-top: 100px;
        padding-bottom: 100px;
        }
    </style>
    </head>
    <body>
        <div class="container">
            <h2>Fixed Width Container</h2>
            This is a simple web page with fixed width container by using <code>.container</code> class.
        </div>
        <!-- jQuery first, then Popper.js, then Bootstrap JS -->
        <script src="https://code.jquery.com/jquery-3.3.1.slim.min.js" integrity="sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo" crossorigin="anonymous"></script>
        <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.3/umd/popper.min.js" integrity="sha384-ZMP7rVo3mIykV+2+9J3UJ46jBk0WLaUAdn689aCwoqbBJiSnjAK/l8WvCWPIPm49" crossorigin="anonymous"></script>
        <script src="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/js/bootstrap.min.js" integrity="sha384-ChfqqxuZUCnJSK3+MXmPNIyE6ZbWh2IMqE241rYiqJxyMiZ6OW/JmZQ5stwEULTy" crossorigin="anonymous"></script>
    </body>
</html>
It will produce the following result − Bootstrap 4 Example

Fixed Width Container

This is a simple web page with fixed width container by using .container class.
Try it Yourself »

Fluid Container

A fluid container spans the full width of the viewport. It will expand and contract fluidly as you resize the browser. This is in contrast to the fixed width container which will appear to "jump" to the new size as you pass a given break point.
<div class = "container-fluid">
   ...
</div>
The below example specifies a simple web page with full width container −
<html lang = "en">
   <head>
      <!-- Meta tags -->
      <meta charset = "utf-8">
      <meta name = "viewport" content = "width = device-width, initial-scale = 1, shrink-to-fit = no">
      
      <!-- Bootstrap CSS -->
      <link rel = "stylesheet" 
         href = "https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.css" 
         integrity = "sha384-MCw98/SFnGE8fJT3GXwEOngsV7Zt27NXFoaoApmYm81iuXoPkFOJwJ8ERdknLPMO" 
         crossorigin = "anonymous">
      <title>Bootstrap 4 Example</title>
       <style>
         .container-fluid {
            background: #a52c644a;
            text-align: center;
            padding-top: 100px;
            padding-bottom: 100px;
         }   
      </style>
   </head>
   
   <body>
      <div class = "container-fluid">
         <h2>Full Width Container</h2>
         This is a simple web page with full width container by using 
         <code>.container-fluid</code> class.
      </div>
      
      <!-- jQuery first, then Popper.js, then Bootstrap JS -->
      <script src = "https://code.jquery.com/jquery-3.3.1.slim.min.js" 
         integrity = "sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo" 
         crossorigin = "anonymous">
      </script>
      
      <script src = "https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.3/umd/popper.min.js" 
         integrity =" sha384-ZMP7rVo3mIykV+2+9J3UJ46jBk0WLaUAdn689aCwoqbBJiSnjAK/l8WvCWPIPm49" 
         crossorigin = "anonymous">
      </script>
      
      <script src = "https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/js/bootstrap.min.js" 
         integrity = "sha384-ChfqqxuZUCnJSK3+MXmPNIyE6ZbWh2IMqE241rYiqJxyMiZ6OW/JmZQ5stwEULTy" 
         crossorigin = "anonymous">
      </script>
      
   </body>
</html>
Try it Yourself »

It will produce the following result −

Bootstrap 4 Example

Full Width Container

This is a simple web page with full width container by using .container-fluid class.