CODE EXAMPLE FOR HTML

bootstrap 4

<div id="date-picker-example" class="md-form md-outline input-with-post-icon datepicker">
  <input placeholder="Select date" type="text" id="example" class="form-control">
  <label for="example">Try me...</label>
  <i class="fas fa-calendar input-prefix" tabindex=0></i>
</div>