how add smooth?

[DimonCoder]

Hello.
I want to close menu by another method.
But smooth works only after i opened and closed menu by your engine.
Why? How to fix it?

var bigSlideAPI = ($('.menu-link').bigSlide({
menuWidth:'10em',
easyClose: true,
speed:'500'
})).bigSlideAPI;

var myElement = document.getElementById('hideMenuStripe');
var mc = new Hammer(myElement);
mc.on("panright", function(ev) {
    bigSlideAPI.view.toggleOpen();
});

var myElement2 = document.getElementById('beBackFon');
var mc2 = new Hammer(myElement2);
mc2.on("panleft", function(ev) {
    bigSlideAPI.view.toggleClose();
});