JSFiddle - React, Tailwind, and code Playground

HTML

<link rel="stylesheet" href="//netdna.bootstrapcdn.com/bootstrap/3.0.0/css/bootstrap.min.css">
<script src="//netdna.bootstrapcdn.com/bootstrap/3.0.0/js/bootstrap.min.js"></script>
<div class="container">
    <h1>No line-height</h1>
    <div class="progress">
        <div class="progress-bar" style="width:50%">50% Progress</div>
    </div>
    <h1>With Line-height</h1>
    <div class="progress" style="line-height:20px">
        <div class="progress-bar" style="width:50%">50% Progress</div>
    </div>
</div>

CSS

body { padding: 30px; }