Message passing between content/background scripts in WebExtension API

Add-ons Development
1

The wiki page for WebExtension says, under “extension” that:

extension:
We support only getBackgroundPage and getURL

Does that mean that chrome.extension.sendMessage is not supported? How do we do message passing between content and background scripts?

Thanks!

2

I’d suggest reading that more carefully. It’s still experimental and still in development. See about extending the APIs here too: https://developer.mozilla.org/en-US/Add-ons/WebExtensions

3

Thanks for the link to additional info. I’ve read the list a few more times, and it seems that at the top of the list it says:

The following APIs are fully or partially supported.

But then, since under ‘extension’ it says that “only” getBackgrondPage and getUrl are supported, I would assume it means that chrome.extension.sendMesssage is not supported. Is this just a glitch in the documentation? The developer.mozilla page you linked to seems to indicate that message passing is indeed a primary way extensions will work.

Is it just not implemented yet?

4

It appears it’s just not implemented yet. I’d hit them up on the uservoice link at the dev page about it though.

5

Yes, that’s the impression that I got as well. Can you point me more specifically in the direction of the uservoice forum? I don’t see a link.

6

https://webextensions.uservoice.com/forums/315663-webextension-api-ideas

7

Thanks so much for all your help!