How to make a fixed column in Bootstrap 3?

Question

Bootstrap

Started learning Bootstrap today. It was necessary to create 3 columns, 2 of which change their width depending on the size of the browser window (or monitor), and one column has a fixed width. With a small screen resolution, all 3 columns should become one column. How can this be implemented?

Answer 1

I decided. I don't know how comme il faut, but still.

<div class="col-sm-3 col-md-3 col-lg-3 newstyle">
Content
</div>

. newstyle {
width:200px!important;
}