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Firebase Deploy Error: "Mux is not a constructor"

See original GitHub issue

I’m having an issue when trying to deploy code with the newest Mux version (3.0.2 – using typescript types). Note: previous Mux versions (before Typescript support worked fine)

I’m deploying my code to Firebase’s cloud functions via the firebase deploy --only functions command.

The code is able to build correctly without errors, but Firebase’s deploy command will throw the following:

Error: Error occurred while parsing your function triggers.

TypeError: Mux is not a constructor
    at Object.<anonymous> (/mnt/l/projects/my_fb_project/backend/functions/lib/index.js:44:57)
    at Module._compile (internal/modules/cjs/loader.js:778:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:789:10)
    at Module.load (internal/modules/cjs/loader.js:653:32)
    at tryModuleLoad (internal/modules/cjs/loader.js:593:12)
    at Function.Module._load (internal/modules/cjs/loader.js:585:3)
    at Module.require (internal/modules/cjs/loader.js:692:17)
    at require (internal/modules/cjs/helpers.js:25:18)
    at /mnt/l/projects/my_fb_project/backend/functions/node_modules/firebase-tools/lib/triggerParser.js:15:15
    at Object.<anonymous> (/mnt/l/projects/my_fb_project/backend/functions/node_modules/firebase-tools/lib/triggerParser.js:53:3)

Issue Analytics

State:
Created 3 years ago
Reactions:2
Comments:9 (2 by maintainers)

Top GitHub Comments

2reactions

kevmo314commented, Sep 5, 2020

I temporarily worked around this by using

const Mux = require('@mux/mux-node');

instead of the standard ts import Mux from '@mux/mux-node'. Inspecting the typescript output, it produces:

var mux_node_1 = require('@mux/mux-node');

var Mux = mux_node_1.default(...);

and unsurprisingly, mux_node_1.default is undefined. Manually confirming this, require('@mux/mux-node').default is undefined.

I’m guessing this project has its exports misconfigured, specifically default exports should be module.exports.default = . I sent a pull request to add an ES6 default export.

1reaction

CubitSpeedcommented, Sep 22, 2020

Thank you everyone. Looks like it is working now

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