I wondered that myself. Heres a tutorial (different version tho) https://webdesign.tutsplus.com/tutorials/how-to-create-a-split-screen-slider-with-javascript--

I wondered that myself. Heres a tutorial (different version tho) https://webdesign.tutsplus.com/tutorials/how-to-create-a-split-screen-slider-with-javascript--cms-28844 https://webdesign.tutsplus.com/tutorials/how-to-create-a-spl...