&lt;label for="inputPassword5"&gt;Password&lt;/label&gt;
&lt;input type="password" id="inputPassword5" class="form-control"&gt;
&lt;small id="passwordHelpBlock" class="form-text text-muted"&gt;
  Your password must be 8-20 characters long, contain letters and numbers, and must not contain spaces, special characters, or emoji.
&lt;/small&gt;