Loading
Border Spinner
                                        
    <div class="spinner-border" role="status">
        <span class="sr-only">Loading...</span>
    </div>
Button Border Spinner
                                        
    <button class="btn btn-primary" type="button" disabled>
        <span class="spinner-border spinner-border-sm" role="status" aria-hidden="true"></span>
        <span class="sr-only">Loading...</span>
    </button>
    <button class="btn btn-primary" type="button" disabled>
        <span class="spinner-border spinner-border-sm" role="status" aria-hidden="true"></span>
        Loading...
    </button>
Button Border Spinner
                                        
    <div class="spinner-border text-*" role="status">
        <span class="sr-only">Loading...</span>
    </button>
Growing Spinner
                                        
    <div class="spinner-grow" role="status">
        <span class="sr-only">Loading...</span>
    </div>
Button Grow Spinner
                                        
    <button class="btn btn-primary" type="button" disabled>
        <span class="spinner-grow spinner-grow-sm" role="status" aria-hidden="true"></span>
        <span class="sr-only">Loading...</span>
    </button>
    <button class="btn btn-primary" type="button" disabled>
        <span class="spinner-grow spinner-grow-sm" role="status" aria-hidden="true"></span>
        Loading...
    </button>