Sweet Alert 2 w/ Promises

HTML

<script src="https://cdn.jsdelivr.net/sweetalert2/6.5.6/sweetalert2.min.js"></script>
<link rel="stylesheet" href="https://cdn.jsdelivr.net/sweetalert2/6.5.6/sweetalert2.min.css">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/font-awesome/4.6.3/css/font-awesome.min.css">
<button>Try me!</button>

CSS

body {
  font-family: 'Open Sans', sans-serif;
}
p {
  line-height: 25px; margin: 30px auto;
  font-size: 17px; font-weight: 300;
  color: #848d94;
  
}
button {
  background-color: #3085d6; color: #fff;
  border: 0; box-shadow: none; border-radius: 3px;
  font-size: 17px; font-weight: 500;
  padding: 15px 35px; margin: 26px 5px 0;
  cursor: pointer;
  white-space: nowrap;
}

Babel + JSX

$('button').on('click', () => {
    return swal({
      title: 'Are you sure?',
      text: "You won't be able to revert this!",
      type: 'warning',
      showCancelButton: true,
      confirmButtonColor: '#3085d6',
      cancelButtonColor: '#d33',
      confirmButtonText: 'Yes, delete it!',
      cancelButtonText: 'No, cancel!',
      confirmButtonClass: 'btn btn-success',
      cancelButtonClass: 'btn btn-danger',
      buttonsStyling: false
    })
    .then( () => {
      swal(
        'Deleted!',
        'Your file has been deleted.',
        'success'
      )
      alert('hunain')
    })
    .catch( (dismiss) => {
      // dismiss can be 'cancel', 'overlay',
      // 'close', and 'timer'
      if (dismiss === 'cancel') {
        swal(
          'Cancelled',
          'Your imaginary file is safe :)',
          'error'
        )
      }
    })
  })