// close something on document click

closer.js

// Non jQuery
function closeSomething( event ) {
	var id = 'ID-of-container';
	function traverseDOM( el ) {
		if ( null === el.parentNode ) {
			return true;
		} else if ( id === el.id ) {
			return false;
		} else {
			return traverseDOM( el.parentNode );
		}
	}
	if ( traverseDOM( event.target ) ) {
		// close the thing.
		something.close();
	}
}
document.addEventListener( 'click', closeSomething );

// jQuery
function closeJQ( event ) {
	var id = 'ID-of-container';
	if ( $( event.target ).parents( '#' + id ) ) {
		// close the thing.
		something.close();
	}
}
document.on( 'click', closeJQ );