TypeError: AwaitLock is not a constructor

[dvaruas]

With the new version 1.2.0 this piece of code throws the error
TypeError: AwaitLock is not a constructor

const AwaitLock = require('await-lock');
const lock = new AwaitLock();

This works with 1.1.3 version.

[ide]

Published a backwards compatibility fix in 1.2.1. I had to manually modify the build output so there is no commit that corresponds to this version of the package. Moving forward, this will not be supported in 2.0.0.

[jsoldi]

Having this problem to. Is it not possible to create an instance of AwaitLock? What's the alternative?

[ide]

The issue is with the way the module is loaded, not the constructor. Use ESM, either natively or with tsc, Babel, SWC, etc.

[Spenhouet]

I'm running into the same issue. Not sure what you mean. Everything else loads fine. Not this module. How to resolve this?

import AwaitLock from 'await-lock';

....

this.mutex = new AwaitLock();

this.mutex = new AwaitLock();
^
TypeError: AwaitLock is not a constructor
at new Model (file:///home/m/scripts/model.ts:78:16)
at file:///home/m/scripts/ecosystem.ts:109:14
at ModuleJob.run (node:internal/modules/esm/module_job:198:25)
at async Promise.all (index 0)
at async ESMLoader.import (node:internal/modules/esm/loader:385:24)
at async loadESM (node:internal/process/esm_loader:88:5)
at async handleMainPromise (node:internal/modules/run_main:61:12)

tsconfig.json:

"compilerOptions": {
    "module": "es2022",
    "moduleResolution": "node",
    "lib": ["es2020"],
    "target": "es2020",
    "esModuleInterop": true,

[Goostavo]

It's a export default module error. It can be fixed easily with adding .default

Working example:

const AwaitLock = require('await-lock').default;
let lock = new AwaitLock();