pageProps is undefined when when web view reloads in Capacitor app using SSG

[halileohalilei]

Summary

I have a Capacitor app that uses Next.js with SSG to generate some static props that needs to be passed down to each individual page. This approach works fine most of the time and I see the props I want to see in each page. However I'm having issues in cases where Capacitor's web view reloads the page for any reason, e.g. the app stays in the background for too long. When the web view reloads the page, pageProps passed to my custom App is just an empty object. This breaks the functionality of the app and the user needs to navigate to a different page and come back for things to go back to normal.

One weird thing I was able to realise is that the JSON file that includes the static props for the current page is not fetched on reloads. It is, however, fetched and loaded properly on initial page loads.

I'm using [email protected] with Capacitor 6.

Additional information

next info output:

Operating System:
  Platform: darwin
  Arch: arm64
  Version: Darwin Kernel Version 24.1.0: Thu Oct 10 21:03:15 PDT 2024; root:xnu-11215.41.3~2/RELEASE_ARM64_T6000
Binaries:
  Node: 20.16.0
  npm: 10.8.1
  Yarn: 1.22.19
  pnpm: 8.7.0
Relevant Packages:
  next: 14.1.0
  eslint-config-next: 14.1.0
  react: 18.2.0
  react-dom: 18.2.0
  typescript: 5.5.3
Next.js Config:
  output: N/A

Example

No response

[icyJoseph]

What is the window.__NEXT_DATA__ value when this issue happens?

[halileohalilei]

However weirdly enough, the value of window.__NEXT_DATA__ is exactly the same with an empty pageProps when the props are being passed to App and everything is functional.

[icyJoseph]

Right, one more thing, there is supposed to be a __NEXT_DATA__ script with JSON data for the "initial" page, is that correct too?

[halileohalilei]

The statically generated HTML file has that script with correctly populated props inside it, however when I run the app and inspect the web view, I can see the JSON inside the script is the same as the JSON I pasted above with an empty pageProps.

[icyJoseph]

Mmm 🤔 are you able to disable JavaScript? I wonder if its getting mutated on client, or by the server... or, if you do view-source is the data correct there? - I guess it might not be possible in Capacitor?

[icyJoseph]

Have you asked around in the Capacitor issues/discussions?