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browser.runtime.onMessage.addListener only accepts 2 arguments

See original GitHub issue

https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/WebExtensions/API/runtime/onMessage

The actual browser.runtime.onMessage.addListener accepts 3 arguments:, message, sender, sendResponse. However, the current implementation only accepts 2 arguments: message, sender

Issue Analytics

State:
Created 2 years ago
Reactions:1
Comments:8 (2 by maintainers)

Top GitHub Comments

5reactions

brnbscommented, Apr 27, 2021

I landed here from Chrome Developer website where I found no mention about returning a Promise, however I gave it a try and just wanted to confirm that this works the same as calling sendResponse:

browser.runtime.onMessage.addListener((message: string) => {
    if (message == "whatever") {
        // Do something
        return Promise.resolve("response");
    }
});

2reactions

joshsmithcommented, Aug 3, 2022

As seen in https://github.com/mozilla/webextension-polyfill/issues/386#issue-1282698182 sendResponse should now be supported by this package.

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