Bootsrtap3 test

by Eugene Manager

HTML

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
<div class="container">
  <div class="row">
    <div class="col-xs-8" style="background:gray">.xs</div>
    <div class="col-xs-4" style="background:yellow">.xs</div>
  </div>
  
  <div class="row">
    <div class="col-xs-8 col-sm-8" style="background:gray">!!!+.col-sm-8</div>
    <div class="col-xs-4 col-sm-4" style="background:yellow">+.col-sm-4</div>
  </div>
  
  <div class="row">
    <div class="col-xs-8 col-md-8" style="background:gray">!!!+.col-md-8</div>
    <div class="col-xs-4 col-md-4" style="background:yellow">+.col-md-4</div>
  </div>
  
  <div class="row">
    <div class="col-xs-8 col-lg-8" style="background:gray">!!!+.col-lg-8</div>
    <div class="col-xs-4 col-lg-4" style="background:yellow">+.col-lg-4</div>
  </div>
  
  <div class="row">
    <div class="col-xs-8" style="background:gray">.xs</div>
    <div class="col-xs-4" style="background:yellow">.xs</div>
  </div>
</div>