nestjs node module issue, How to use when/sequence module in nestjs

Question

I writing a code in nestjs. I am using the when module (https://www.npmjs.com/package/when) in my project.

I am importing when module as follows

import { sequence } from "when/sequence";

but when I print the sequence. it gives value as undefined. for that reason, not able to use when a module in nestjs any idea here how to import and install node module in nestjs

the last release of this package was in 2017 lol I think you can replace it — Micael Levi
– Micael Levi, Commented Oct 26, 2021 at 21:30

Japsz · Accepted Answer · 2021-10-26 19:49:41Z

1

Seems like when only compiles to CommonJs and AMD. Therefore, it doesn't allow the import .. from "..." syntax introduced in ES6.

You should import it is using require().

const sequence = require("when/sequence")

edited Oct 26, 2021 at 19:49

answered Oct 26, 2021 at 19:23

Japsz

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2 Comments

Suraj Dalvi Over a year ago

same issue. I am using node 14.17.5. is there any other way here?

Micael Levi Over a year ago

@SurajDalvi but you can use node 14.17.5 without using ESM. But if you want to use ESM, then read this nodejs.org/api/module.html#modulecreaterequirefilename

Micael Levi · Accepted Answer · 2021-10-26 21:41:08Z

0

import { sequence } from "when/sequence.js";

or use dynamic imports to load CJS modules:

const { default: sequence } = await import("when/sequence.js");

answered Oct 26, 2021 at 21:41

Micael Levi

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