wp.customize.controlConstructor['toggle'] = wp.customize.Control.extend({

    ready: function () {

        'use strict';

        var control = this,
                checkboxValue = control.setting._value;

        // Save the value
        this.container.on('change', 'input', function () {
            checkboxValue = (jQuery(this).is(':checked')) ? true : false;
            control.setting.set(checkboxValue);
        });

    }

});