How to improve scroll performance to pass Google audit?

Question

Client side optimization

Hello!

I came across this presentation from Google, began to read and look for a solution to the problem. There is not much information, often they write that this code helps:

document.addEventListener('mousewheel', event => {

}, { passive: true });

document.addEventListener('wheel', event => {

}, { passive: true });

document.addEventListener('scroll', event => {

}, { passive: true });


document.addEventListener('touchstart', event => {

}, { passive: true });

document.addEventListener('touchend', event => {

}, { passive: true });

document.addEventListener('touchmove', event => {

}, { passive: true });

But when I run the audit again, the recommendation remains. How to fix it?

Answer 1

jQuery.event.special.touchstart = {
    setup: function( _, ns, handle ) {
        this.addEventListener("touchstart", handle, { passive: !ns.includes("noPreventDefault") });
    }
};

Added this code. PageSpeed ​​stopped swearing