Bootstrap 4 modal not closing code example

Example 1: prevent bootstrap modal from closing when clicking outside

<div id="idModal" class="modal hide" data-backdrop="static" data-keyboard="false">

Example 2: bootstrap modal don't dismiss

<div class="modal fade" id="myModal" data-backdrop="static" tabindex="-1" role="dialog" aria-labelledby="myModalLabel" aria-hidden="true">

Example 3: 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">