how to close modal in bootstrap code example

Example 1: data-dismiss= modal in jquery

$(document).ready(function(){
        // Open modal on page load
        $("#myModal").modal('show');
 
        // Close modal on button click
        $(".btn").click(function(){
            $("#myModal").modal('hide');
        });
    });

Example 2: close bootstrap modal with javascript

$('#myModal').modal('hide');

Example 3: bootstrap modal prevent close

$('#myModal').modal({backdrop: 'static', keyboard: false})

Example 4: bootstrap modal not close

$('#MymodalPreventScript').modal({
    		backdrop: 'static',
    		keyboard: false
		});

Example 5: bootstrap 3 modal close only with button

<--! Add following to modal Div : data-backdrop='static' -->
<div id="modal" class="modal hide fade in" data-keyboard="false" data-backdrop="static">

Example 6: small modal popup bootstrap

<!-- Button trigger modal -->
<button type="button" class="btn btn-primary" data-toggle="modal" data-target="#exampleModalCenter">
  Launch demo modal
</button>

<!-- Modal -->
<div class="modal fade" id="exampleModalCenter" tabindex="-1" role="dialog" aria-labelledby="exampleModalCenterTitle" aria-hidden="true">
  <div class="modal-dialog modal-dialog-centered" role="document">
    <div class="modal-content">
      <div class="modal-header">
        <h5 class="modal-title" id="exampleModalLongTitle">Modal title</h5>
        <button type="button" class="close" data-dismiss="modal" aria-label="Close">
          <span aria-hidden="true">×</span>
        </button>
      </div>
      <div class="modal-body">
        ...
      </div>
      <div class="modal-footer">
        <button type="button" class="btn btn-secondary" data-dismiss="modal">Close</button>
        <button type="button" class="btn btn-primary">Save changes</button>
      </div>
    </div>
  </div>
</div>