[Support request] Passive listeners to improve scrolling performance

[Uwe]

Hello Support-Team,

I made a lighthouse analyze.
One of the errors was this:
“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.

I am not a specialist and do not know is this error about of the theme or in WordPress?
Do you know how to resolve the problem?

[David]

Hi there,

its a WordPress ‘bug’ – there is a ticket open relating to a fix for this:

https://core.trac.wordpress.org/ticket/47510

It’s not an issue i would be overly concerned about.

[Uwe]

Danke David!

[David]

You’re welcome

[Grant]

Looks like that bug isn’t getting fixed anytime soon. I have placed some javascript in my footer that works.
I not sure if posting that code here is a good idea so this is the link to the page.

WordPress and best practice with passive event listeners

Cheers!

[David]

Thanks for sharing Grant 🙂

[Grant]

Bad news! The new version (beta – rc3) of WordPress does not seem to fix this issue. My code posted still works great.

[Juan Pablo]

Hello, Grant.

How do you insert that code? Can you show me, I’m not developer. Thanks

[David]

I tried the javascript code above and it broke the primary navigation when I used submenus.

https://stackoverflow.com/questions/45974128/wordpress-and-best-practice-with-passive-event-listeners

I tried this code here on this page and it seems to work fine

https://dtlytics.com/2020/11/does-not-use-passive-listeners-solved/

Another words the first solution doesn’t seem to be compatible with GeneratePress while the second one is.

[Leo]

Thanks for sharing!

[Grant]

The code I posted doesn’t assume that you use jQuery. People should use what works for them.
Cheers!

[Author]

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