How to create HTML tooltips and pop-up dialogs in Go web pages?

To create HTML tooltips and pop-up dialogs in Go web pages, you can use JavaScript and Bootstrap.

Add the Bootstrap CSS and JavaScript files to your HTML page:

<head>
  <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.5.2/css/bootstrap.min.css">
  <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script>
  <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.16.0/umd/popper.min.js"></script>
  <script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.5.2/js/bootstrap.min.js"></script>
</head>

Create a tooltip by adding the data-toggle and data-placement attributes to an element:

<button type="button" class="btn btn-secondary" data-toggle="tooltip" data-placement="top" title="Tooltip text">Tooltip</button>

Initialize the tooltip in JavaScript:

<script>
$(document).ready(function(){
  $('[data-toggle="tooltip"]').tooltip();
});
</script>

Create a pop-up dialog using Bootstrap modal component:

<!-- Button to trigger the modal -->
<button type="button" class="btn btn-primary" data-toggle="modal" data-target="#myModal">Open Modal</button>

<!-- The Modal -->
<div class="modal" id="myModal">
  <div class="modal-dialog">
    <div class="modal-content">
    
      <!-- Modal Header -->
      <div class="modal-header">
        <h4 class="modal-title">Modal Title</h4>
        <button type="button" class="close" data-dismiss="modal">&times;</button>
      </div>
      
      <!-- Modal body -->
      <div class="modal-body">
        Modal body text goes here.
      </div>
      
      <!-- Modal footer -->
      <div class="modal-footer">
        <button type="button" class="btn btn-secondary" data-dismiss="modal">Close</button>
      </div>
      
    </div>
  </div>
</div>

That's it! Now you have HTML tooltips and a pop-up dialog in your Go web page.