@momentum-ui/react-collaboration/scss/components/avatar/examples/typing.html

Cisco Momentum UI Framework for React Collaboration Applications

  <div class="md-avatar md-avatar--typing" title="Barbara">
      <img alt="Barbara" class="md-avatar__img" src="http://react.collab-ui.com/barbara.png">
      <div class="md-loading">
      <span class="md-loading__icon"></span>
      <span class="md-loading__icon"></span>
      <span class="md-loading__icon"></span>
    </div>
  </div>