How to add tool tip for a widget button

[akshay parekar1]

Hey everyone, i need a help

on my widget there is modal window and a submit button also (attaching screenshot)

Now, if someone tries to click submit without filling some text in additional comments, there i want tootip like "Comments are Mandatory".

  i'm sharing my html please help me out with this ASAP

<div class="modal-header" style="background-color: #232222;font-size:24px;">
   
<label for="exampleFormControlInput1" class="form-label" style="font-color:white" >Additional Comments</label>
  <button ng-click="closeModal()" class="close">
    <i class="las la-times"></i>
  </button>
</div>

<div>
  <div class="modal-body">
    <div class="form-group full-width" >

<label for="exampleFormControlTextarea1" class="form-label" style="background-color: #ffffff" ><h4>* Please provide additional comments for cancelling the approval request</h4></label>

<div class="mb-3">

<textarea class="form-control c.commentvalue" ng-model="c.commentvalue" field = "c.commentvalue" display-field="'c.commentvalue'" id="exampleFormControlTextarea1" rows="3"></textarea>
</div>


    </div>
    </div>
</div>

<div class="modal-footer">
 

  <button class="btn btn-danger pull-left"
          ng-click="c.closeModal()">
    Cancel
  </button>

<button class="btn btn-primary pull-left"
          ng-click="c.onSubmitcomment(c.commentvalue)"
          ng-disabled="!c.commentvalue">
    Submit



  </button>
</div>

[akshay parekar1]

Also what i have to write in client script for this?

[akshay parekar1]

Hey, is this question even visible to anyone

I posted earlier they also don't got any replies