next/script strategy="worker" in App Router

[karlhorky]

Currently, the next/script feature to load scripts in web workers via Partytown (<Script strategy="worker" />) does not work with the App Router:

Warning: The worker strategy is not yet stable and does not yet work with the app directory. Use with caution.

It would be great to get scripts loaded by a web worker to improve performance, such as is recommended in some places.

Goals

1. Use strategy="worker" in App Router
2. Enable loading of third party scripts such as Google Analytics in web workers as recommended in third-party-capital ("offload to a web worker")

Non-Goals

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Background

The feature for the Pages Router was first introduced by @housseindjirdeh in the following PR:

• Adds web worker support to <Script /> using Partytown #34244

Proposal

Maybe @housseindjirdeh would be interested in contributing this feature? Or if not, offering some tips on how it could be accomplished?

[karlhorky]

Oh I just found the discussion #53868, which briefly mentions the strategy="worker" mode and some caveats:

A while back, we rolled out an experimental worker strategy to the Script component to allow anyone to move the processing of a third-party script to a web worker. This feature, which uses Partytown, is especially useful when used for tag managers but it can be tricky to set up.

[AtomSpy]

Will partytown, which next/script is using under the hood, work in the app router?

[guybinya]

Anyone tried it?

[YashChauhan858]

It doesn't work

[danyroza]

Hi, is there any follow-up on this feature? Alternatively, are there any other ways to load 3rd party scripts in the background when app router is used?