Kill spawned processes on App close from Javascript Code

[touhidurrr]

Hi! I am using Tauri for a while to write production apps. I am not being able to close spawned processes when the app is closed. How do I do it?

Note I tried listening to WINDOW_DESTROYED event from JavaScript API, using the browsers onbeforeunload event, etc but none worked.

Also, I tried using this code to listen to all events but it seems like the code cannot detect some events like WINDOW_CLOSE_REQUESTED, WINDOW_CREATED, WINDOW_DESTROYED, etc from JavaScript API.

import { writeTextFile } from "@tauri-apps/api/fs";
import { listen, TauriEvent } from "@tauri-apps/api/event";

Object.entries(TauriEvent).forEach(([key, value]) => {
  listen<string>(value, async (event) => {
    console.log("Closing App..");
    writeTextFile(key, `${key} on ${new Date().toLocaleString()}\n${JSON.stringify(event, null, 2)}`);
  });
});

Only these 4 events were logged after much testing:

Can anyone tell me the correct way to do it?

EDIT: appWindow.onCloseRequested worked after dynamically importing @tauri-apps/api/window.

[FabianLars]

hmm, maybe try the window specific listen methods (like appWindow.listen), which also has a helper function: https://tauri.app/v1/api/js/window#oncloserequested

Hi! I am using Tauri for a while to write production apps. I am not being able to close spawned processes when the app is closed. How do I do it?

It depends. If it's spawned as a sidecar then Tauri should handle it itself. The problem is that some (sidecar) apps spawn multiple processes without cleaning up after themselves. This is currently only solvable in Rust, see #3273 for example.
If we're talking about "normal" Commands (not sidecars) then you need to handle it yourself.

[touhidurrr]

@FabianLars I don't know Rust. I am a FullStack JS/TS developer. I am using the @tauri-apps/api/shell api to spawn command and kill them while Tauri throws some kind of app close event. For that I tried using @tauri-apps/api/event and as you can see that is not working.

What do you recommend me to do in this situation?

[touhidurrr]

hmm, maybe try the window specific listen methods (like appWindow.listen), which also has a helper function: https://tauri.app/v1/api/js/window#oncloserequested

tried that also in the dev mode but got the following error:

[FabianLars]

Sounds like you're using a SSR framework? In which case you need to change the appWindow import to a dynamic import (the await import('') thingies)

[touhidurrr]

ok, dynamic imports worked. but before you, my friend came up with the solution by trial and error. thanks for helping though anyways.