on click modal close code example

Example 1: on modal close jquery

$('#myModal').on('hidden.bs.modal', function () {
  // do something…
})

Example 2: prevent close modal when click outside

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

or in HTML
<a data-controls-modal="your_div_id" data-backdrop="static" data-keyboard="false" href="#">