node_modules/material-design-lite/src/snackbar/snippets/toast.html

<button id="demo-show-toast" class="mdl-button mdl-js-button mdl-button--raised" type="button">Show Toast</button>
<div id="demo-toast-example" class="mdl-js-snackbar mdl-snackbar">
  <div class="mdl-snackbar__text"></div>
  <button class="mdl-snackbar__action" type="button"></button>
</div>
<script>
(function() {
  'use strict';
  window['counter'] = 0;
  var snackbarContainer = document.querySelector('#demo-toast-example');
  var showToastButton = document.querySelector('#demo-show-toast');
  showToastButton.addEventListener('click', function() {
    'use strict';
    var data = {message: 'Example Message # ' + ++counter};
    snackbarContainer.MaterialSnackbar.showSnackbar(data);
  });
}());
</script>