JSFiddle - React, Tailwind, and code Playground

HTML

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css">
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js"></script>
<div class="masthead">
  <div class="row">
    <div id="div1" class="col-xs-6" style="border:solid 1px;">
      <img src="http://drawception.com/pub/panels/2012/12-28/MnbfrYALQj-2.png" width="250" height="150" />
    </div>
    <div id="div2" class="col-xs-6" style="border:solid 1px;">
      <h1>My website title</h1>
    </div>
  </div>
</div>

CSS

.row {
  display: flex;
}