Fix IE11 and Edge position fixed scroll jank.js

// Works on desktop browsers only
if (navigator.userAgent.match(/Trident\//) || navigator.userAgent.match(/Edge\//)) {
    document.body.addEventListener("mousewheel", function(evt) {
        evt.preventDefault();
        var wd = evt.wheelDelta;
        var csp = window.pageYOffset;
        window.scrollTo(0, csp - wd);
    });
    
    // If the code block above doesn't work, please try attaching the event to the window like so:
    
//     window.addEventListener("mousewheel", function(evt) {
//         evt.preventDefault();
//         var wd = evt.wheelDelta;
//         var csp = window.pageYOffset;
//         window.scrollTo(0, csp - wd);
//     });
}