Parallax-like interaction

parallax-ish.js

// Parallax-like interaction "stolen" from https://www.awwwards.com/PWA-ebook
window.addEventListener('mousemove', move);

function move(){

    var w = window,
    d = document,
    e = d.documentElement,
    g = d.getElementsByTagName('body')[0],
    window_width = w.innerWidth||e.clientWidth||g.clientWidth,
    window_height = w.innerHeight||e.clientHeight||g.clientHeight;

    var pos_x = (event.clientX/window_width);
    var pos_y = (event.clientY/window_height);

    TweenLite.to(document.querySelector(".ico-1"), 0.6, { x: pos_x * 20, y: pos_y * 20, transformOrigin:"center" });
    TweenLite.to(document.querySelector(".ico-2"), 0.6, { x: -(pos_x * 10), y: -(pos_y * 10), transformOrigin:"center" });
    TweenLite.to(document.querySelector(".ico-3"), 0.6, { x: pos_x * 15, y: pos_y * 10, transformOrigin:"center" });
    TweenLite.to(document.querySelector(".ico-4"), 0.6, { x: pos_x * 20, y: pos_y * 20, transformOrigin:"center" });
    TweenLite.to(document.querySelector(".ico-5"), 0.6, { x: -(pos_x * 10), y: -(pos_y * 10), transformOrigin:"center" });
    TweenLite.to(document.querySelector(".ico-6"), 0.6, { x: pos_x * 15, y: -(pos_y * 5), transformOrigin:"center" });

}