toggle

jQuery toggle functions

The toggle() method was deprecated in jQuery 1.8 and removed in 1.9.
In jQuery 1.9 the toggle() method does not toggle between two or more functions on a click event, it just toggles the visibility of an element.

Here is a quick way of replacing it:

var toggle = 0;
$('#toggle-btn').on('click', function(event) {
	event.preventDefault();
	if ( toggle == 1 ){
		// not clicked
		$(this).removeClass('clicked');
		toggle = 0;
	} else {
		// clicked
		$(this).addClass('clicked');
		toggle = 1;
	}
});

or just using a class,

$('#toggle-btn').on('click', function(event) {
	event.preventDefault();
	if ( $(this).hasClass('active') ) {
		$(this).removeClass('active');
	} else {
		$(this).addClass('active');
	}
});

See demo here.