bootpopupform.html

<div class="modal fade" id="aa">
  <div class="modal-dialog modal-lg" > <!--modal-xl,sm,lg--->
    <div class="modal-content">
      <div class="modal-header">
        <h5 class="modal-title">Login Form</h5>

         <button type="button" class="btn-close" data-bs-dismiss="modal" aria-label="Close"></button>

      </div><!---modal header end--->
      <div class="modal-body">
<form>
          <div class="mb-3">
            <label>Username</label>
            <input type="text" name="" placeholder="ENter User name" class="form-control">
          </div>
          <div class="mb-3">
            <label>Password</label>
            <input type="password" name="" placeholder="ENter User name" class="form-control">
          </div>
          <button type="submit" class="btn btn-primary">Submit</button>
        </form>

      </div><!-- modal body--->
  </div><!---model dialog--- end=--->
</div>