dropdown menu opens not below button code example

Example 1: bootstrap dropdown toggle show until closed

// Prevents menu from closing when clicked inside 
        document.getElementById("Dropdown").addEventListener('click', function (event) { 
            alert("click outside"); 
            event.stopPropagation(); 
        });

Example 2: i want the dropdown to remain after click event

$('#myDropdown').on('hide.bs.dropdown', function () {
   return false;
});