Skeleton

Basic Skeleton 
<div class="row">
        <span class="placeholder col-6 placeholder-lg rounded mb-3"></span>
        <span class="placeholder col-12 placeholder-lg rounded mb-2"></span>
        <span class="placeholder col-12 placeholder-lg rounded mb-2"></span>
        <span class="placeholder col-12 placeholder-lg rounded mb-2"></span>
        <span class="placeholder col-12 placeholder-lg rounded"></span>
    </div>
Complex combination 
<div class="row">
        <span class="placeholder col-5 placeholder-circle mb-1"></span>
        <div class="col-10">
            <span class="placeholder col-6 placeholder-lg rounded mb-3"></span>
            <span class="placeholder col-12 placeholder-lg rounded mb-2"></span>
            <span class="placeholder col-12 placeholder-lg rounded mb-2"></span>
            <span class="placeholder col-12 placeholder-lg rounded mb-2"></span>
            <span class="placeholder col-12 placeholder-lg rounded"></span>
        </div>
    </div>
Active animation 
<div class="row placeholder-glow">
        <span class="placeholder col-5 placeholder-circle mb-1"></span>
        <div class="col-10">
            <span class="placeholder col-6 placeholder-lg rounded mb-3"></span>
            <span class="placeholder col-12 placeholder-lg rounded mb-2"></span>
            <span class="placeholder col-12 placeholder-lg rounded mb-2"></span>
            <span class="placeholder col-12 placeholder-lg rounded mb-2"></span>
            <span class="placeholder col-12 placeholder-lg rounded"></span>
        </div>
    </div>
Card title

Some quick example text to build on the card title and make up the bulk of the card's content.

Go somewhere
Animation 

<p class="placeholder-glow mb-0">
        <span class="placeholder col-12"></span>
    </p>
    <p class="placeholder-wave mb-0">
        <span class="placeholder col-12"></span>
    </p>
Sizing 
<span class="placeholder col-12 placeholder-xl mb-1"></span>
    <span class="placeholder col-12 placeholder-lg"></span>
    <span class="placeholder col-12"></span>
    <span class="placeholder col-12 placeholder-sm"></span>
    <span class="placeholder col-12 placeholder-xs"></span>
Colors 
<span class="placeholder col-12"></span>
    <span class="placeholder col-12 bg-primary"></span>
    <span class="placeholder col-12 bg-secondary"></span>
    <span class="placeholder col-12 bg-success"></span>
    <span class="placeholder col-12 bg-danger"></span>
    <span class="placeholder col-12 bg-warning"></span>
    <span class="placeholder col-12 bg-info"></span>
    <span class="placeholder col-12 bg-light"></span>
    <span class="placeholder col-12 bg-dark"></span>
Width 
<span class="placeholder bg-primary col-6"></span>
    <span class="placeholder bg-primary w-75"></span>
    <span class="placeholder bg-primary" style="width: 25%;"></span>