Gallery with custom easing.

You can pass easing property via lightgallery cssEasing setting. Bellow you can find some of the possible values of cssEasing. Demo values are taken from @matthewlein's ceaser

Javascript

lightGallery(document.getElementById('custom-easing'), {
    cssEasing: 'cubic-bezier(0.680, -0.550, 0.265, 1.550)'
})