PageSpeed Insights recommends using passive flag for touch event listeners

[kajman-cz]

In diagnostic section in PageSpeed for page with Flickity 2.3.0 https://pagespeed.web.dev/analysis/http-kod-djpw-cz-lfld-/640hzu4fjs?form_factor=mobile is Does not use passive listeners to improve scrolling performance Consider marking your touch and wheel event listeners as passive to improve your page's scroll performance. Learn more about adopting passive event listeners.

I don't know if it is enough to replace in the library this row elem[ bindMethod ]( startEvent, this ); by elem[ bindMethod ]( startEvent, this, /^(touch|wheel)/.test(startEvent) ? { passive : true } : false );

Passive support should also be detected for old browsers.

[maddhacker24]

Any update on this? Google Page Speed Insights/Lighthouse is flagging Flickity on my website as well.