How can I import a third-party function into typescript class?

Asked Aug 31 '17 at 12:41

Active Jun 10 '19 at 10:47

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I'm trying to import deepEqual function (https://github.com/substack/node-deep-equal) into a Angular class written in TypeScript.

I've installed @types/deep-equal and I have set module in tsconfig.json to es2015.

import * as deepEqual from 'deep-equal'; is not working: [ts] Module '"node_modules/@types/deep-equal/index"' resolves to a non-module entity and cannot be imported using this construct.

import 'deep-equal'; also not working: [ts] Cannot find name 'deepEqual'.

If I manually add the definition at top of the page, the app compiles but throws an error at runtime (not surprisingly): An error occurred ReferenceError: deepEqual is not defined

This is the export from js file: var deepEqual = module.exports = function (actual, expected, opts) {...}

Any help would be appreciated.

edited Aug 31 '17 at 12:42

asked Aug 31 '17 at 12:41

Tzach Ovadia

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https://stackoverflow.com/a/39415662/426422 – Mike Cheel Aug 31 '17 at 12:42
@MikeCheel tried it, but this only works if I change module to commonjs which I prefer not to do – Tzach Ovadia Aug 31 '17 at 12:43
https://github.com/Microsoft/TypeScript-Handbook/issues/350. – Mike Cheel Aug 31 '17 at 14:36

How can I import a third-party function into typescript class?

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