bootstrap 4 modal popup prevent close on click outside code example
Example 1: 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="#">
Example 2: do not close dialog box when click outside bootstrap modal
<div id="idModal" class="modal hide" data-backdrop="static" data-keyboard="false">