Add class only to clicked element with JS

jQuery(document).on('click', function() {
    jQuery('.collapse').removeClass("show");
});

jQuery(".collapse").click(function(event) {
    // remove classes from all
    jQuery('.show').removeClass('show');
    // add class to the one we clicked
    jQuery('.collapse', this).addBack(this).addClass("show");
    event.stopPropagation();
});