how to change container width in bootstrap 4 code example

Example 1: bootstrap container-fluid

Use .container-fluid for a full width container, spanning the entire width of the viewport.

<div class="container-fluid">
  ...
</div>

Example 2: bootstrap container

Our default .container class is a responsive, fixed-width container, meaning its max-width changes at each breakpoint.

<div class="container">
  <!-- Content here -->
</div>

Example 3: bootstrap container width

--------------------------------------------------------------------------------------
Bootstrap Container Width			 					| Size        | Class Prefix
--------------------------------------------------------------------------------------
Extra small devices Phones (less than 768px)  			| None (auto) | .col-xs-
Small devices Tablets (greater than equals 768px) 		| 750px       | .col-sm-
Medium devices Desktops (greater than equals 992px)     | 970px       | .col-md-
Large devices Desktops (greater than equals 1200px)     | 1170px      | .col-lg-