Version: 4.0.0-alpha.2

License: MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)

Contents Copyright: (c) 2011-2016 Twitter, Inc.

There are times when you only want to use the excellent Bootstrap grid functionality but don't want the extra classes and typography changes included, often when asked to work on existing client sites that do not include any responsive frameworks and you just want to get the changes done quickly and responsively. With Bootstrap 4, extracting the grid functionality is easy.

• Grid framework (flex enabled)
• Responsive Utilities
• Manually added the .img-fluid class (formerly .img-responsive in Bootstrap 3) because it's handy

I have already taken the liberty of extracting the grid and responsive utilities mixins (for those who don't know how or don't want to bother keeping it updated), which can be found in dist/css/bootstrap-grid.css. I also wrapped the classes with the .bootstrap-wrapper class to avoid conflicts with other classes that may already be used in a project.

Simply download the appropriate CSS file and include it in your HTML header (you only need one):

• bootstrap-grid.css - The expanded version
• bootstrap-grid.min.css - The minified version
• bootstrap-grid-noflex.min.css - The minified version with flex support disabled

Documentation for the grid framework and responsive utilities may be found on the Bootstrap 4 web site.

<div class="bootstrap-wrapper">
	<div class="container">
		<div class="row">
			<div class="col-md-4">.col-md-4</div>
			<div class="col-md-4">.col-md-4</div>
			<div class="col-md-4">.col-md-4</div>
		</div>
		<div class="row hidden-sm-down"> <!-- Hidden on small screens -->
			<div class="col-md-6">.col-md-6</div>
			<div class="col-md-6">.col-md-6</div>
		</div>
	</div>
</div>

You can make your own custom build of Bootstrap by downloading the source, making changes to the SCSS files and compiling.

Here is how you can accomplish what I have done here:

1. Download and extract the Bootstrap source files
2. Modify the SCSS files as desired. For example, to generate this build I added the .bootstrap-wrapper class to scss/bootstrap-grid.scss (lines 55 and 69), included the responsive utilities (line 64) and .img-fluid class (lines 67-68). I also enabled flex support in scss/_variables.scss on line 46.
3. Once you are done making your changes, use a program like Koala or Scout to compile the SCSS files into usable CSS files.

As you can see, it is a very easy process to create your own customized Bootstrap build.

• Bootstrap