Problem with 2 way communication to & from iframe

[ssured]

I extended the iframe example a little, see https://gist.github.com/ssured/79471d3e78332e60567012969f716355

When running I get proper results and 2 errors:

Line 67 refers to

comlink/comlink.ts

Line 190 in c2be4ca

let that = await irequest.callPath.slice(0, -1).reduce((obj, propName) => obj[propName], rootObj as any);

Changing this line:

comlink/comlink.ts

Line 187 in c2be4ca

if (!event.data.id)

to if (!event.data.id || !event.data.callPath) fixes the problem, but I really don't know if thats OK.

Thanks for the library. Any help on getting 2 way communication done is greatly appreciated.

[surma]

Ah, you can’t re-use the same postMessage channel for multiple expose() calls. It’s been “used up” already. Maybe that’s something I should change. I’ll think about it.

For now, I’d recommend just defining a function where you pass the parentApi object as a parameter and wrap it in proxyValue(). I whipped up a Glitch (demo, code) using your code as a starting point.

Let me know if that helps :)

[ssured]

Thanks @surma. It totally helps 👍 Dunno but for me 2 way communication is essential to talk to a remote webpage and back. Your code exposes a really nice way to set this up between browsers. Maybe nice to add to the README?
I did not test yet in a 'real' scenario yet though, as I was hitting cross-origin issues when talking from our company page to a github.io hosted static PWA.

Thanks for your help!