Does not use passive listeners to improve scrolling performance

[ia-gaurav]

Preconditions :

Magento 2.4 latest version

Steps 1: Check you site via google page speed :https://developers.google.com/speed/pagespeed/insights
Steps 2: Check audit report you will see below issues
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.
Source
…en_US/jquery.min.js:313:558

Can it be fixed are it is causing issue with mobile perfomace

[m2-assistant]

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[mrtuvn]

the fix maybe take times even a years to deploy/merge into codebase
i think you can workarounds and patch with your own way
https://stackoverflow.com/questions/60357083/does-not-use-passive-listeners-to-improve-scrolling-performance-lighthouse-repo
Add web/jquery.js to your theme instead modify core. Add some patch at bottom

[Quazz]

Personally I've been using the following patch on jquery for ages:

require(['jquery'], function(jQuery) {
    'use strict';
    (function() {
        jQuery.event.special.touchstart = {
            setup: function(_, ns, handle) {
                this.addEventListener('touchstart', handle, {passive: ns.includes('noPreventDefault') ? true : false});
            }
        };
        jQuery.event.special.touchmove = {
            setup: function(_, ns, handle) {
                this.addEventListener('touchmove', handle, {passive: ns.includes('noPreventDefault') ? true : false});
            }
        };
    }());
});

[mrtuvn]

Add to the file lib/web/jquery/patches/jquery.js

[mrtuvn]

Created pr for jquery newer version here
#34162

@ia-gaurav See my link above

[ia-gaurav]

@mrtuvn - can u tell what to add in lib/web/jquery/patches/jquery.js

[nkajic]

https://gist.github.com/nkajic/727ae5ff874894f96356b44eece9fd6a

[m2-assistant]

Hi @engcom-Hotel. Thank you for working on this issue.
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[engcom-Hotel]

@magento give me 2.4-develop instance

[magento-deployment-service]

Hi @engcom-Hotel. Thank you for your request. I'm working on Magento instance for you.

[magento-deployment-service]

Hi @engcom-Hotel, here is your Magento Instance: https://6dd90eea1a8e2a0fc4db3ee65e365b93-2-4-develop.instances.magento-community.engineering
Admin access: https://6dd90eea1a8e2a0fc4db3ee65e365b93-2-4-develop.instances.magento-community.engineering/admin_b01d
Login: ef808a7f
Password: 82a61d380e70

[engcom-Hotel]

@magento give me 2.4-develop instance

[magento-deployment-service]

Hi @engcom-Hotel. Thank you for your request. I'm working on Magento instance for you.

[magento-deployment-service]

Hi @engcom-Hotel, here is your Magento Instance: https://6dd90eea1a8e2a0fc4db3ee65e365b93-2-4-develop.instances.magento-community.engineering
Admin access: https://6dd90eea1a8e2a0fc4db3ee65e365b93-2-4-develop.instances.magento-community.engineering/admin_06e0
Login: b0960393
Password: 87c2fcf1119a

[engcom-Hotel]

Hello @ia-gaurav,

We have checked this issue on the cloud instance, but we are unable to reproduce the issue. The issue you mentioned in the description is not visible on both desktop and mobile reports.

Please let us know if we have missed anything in order to reproduce the issue.

Thanks

[mrtuvn]

Added solution fix in above link in my comment
#34162

[mrtuvn]

@engcom-Hotel You may not notice this line

At categories Performance

[engcom-Hotel]

@magento give me 2.4-develop instance

[magento-deployment-service]

Hi @engcom-Hotel. Thank you for your request. I'm working on Magento instance for you.

[magento-deployment-service]

Hi @engcom-Hotel, here is your Magento Instance: https://6dd90eea1a8e2a0fc4db3ee65e365b93-2-4-develop.instances.magento-community.engineering
Admin access: https://6dd90eea1a8e2a0fc4db3ee65e365b93-2-4-develop.instances.magento-community.engineering/admin_f5b1
Login: 92acc59b
Password: ce8ac2d7e586

[engcom-Hotel]

@magento give me 2.4.3 instance

[magento-deployment-service]

Hi @engcom-Hotel. Thank you for your request. I'm working on Magento instance for you.

[magento-deployment-service]

Hi @engcom-Hotel, here is your Magento Instance: https://6dd90eea1a8e2a0fc4db3ee65e365b93-2-4-3.instances.magento-community.engineering
Admin access: https://6dd90eea1a8e2a0fc4db3ee65e365b93-2-4-3.instances.magento-community.engineering/admin_39de
Login: ba683289
Password: 44f6f42754f1

[engcom-Hotel]

Hello @mrtuvn,

Thanks for the updates!

I was checking the homepage, the issue is not visible there but inner page the issue can be reproducible. Please have a look at to below screenshot:

@ia-gaurav Since the issue is reproducible, we are confirming this issue.

Thanks

[github-jira-sync-bot]

✅ Jira issue https://jira.corp.magento.com/browse/AC-1541 is successfully created for this GitHub issue.

[m2-assistant]

✅ Confirmed by @engcom-Hotel. Thank you for verifying the issue.
Issue Available: @engcom-Hotel, You will be automatically unassigned. Contributors/Maintainers can claim this issue to continue. To reclaim and continue work, reassign the ticket to yourself.

[github-jira-sync-bot]

❌ You don't have permission to export this issue.

[hostep]

@engcom-Hotel: now that you have confirmed this, could you edit your post with those super large images and remove them? Those large images cause issues in our browsers while scrolling through this issue due to taking up a lot of resources while trying to display them. Much appreciated, thanks!

[in-session]

Of course, you always start from Luma, but I think there will be problems with the adaptation of a shop at the latest. Here is an example from my current dev environment.

https://stackoverflow.com/a/68489296