Allow ES-style import { debounce } from "debounce"? about debounce HOT 11 CLOSED

create a definition, as suggested here.

Alas, that isn't a workable or future-proof solution. ☹

There's a good reason why TypeScript refuses to acknowledge the type declaration for debounce: what it's doing isn't compatible with ES modules, only CommonJS. ES modules don't allow the exported object to be callable (a function). It can contain members that are functions, but it itself must be an object.

This will not work in systems that properly implement the new spec:

import * as debounce from "debounce";

// This should give an error about not being callable
debounce(...);

...while this is allowed and encouraged:

import { debounce } from "debounce";

debounce(...);

Links in the OP for why this is the case.

from debounce.

@ChuckJonas yup, the problem there is that the debounce package was updated but your TypeScript typings in the @types/debounce package were not.

DefinitelyTyped/DefinitelyTyped#29768

Once that PR is merged, as soon as a new version of @types/debounce is published (normally within a few hours) it'll have the right change.

from debounce.

Yes, I can't use this with imports

from debounce.

Import works for me with typescript/webpack.

from debounce.

@senyaak How did you managed it to work? I'm also working with TS + webpack and using
import { debounce } from 'debounce';
gives me error

Could not find a declaration file for module 'debounce'. '...\node_modules\debounce\index.js' implicitly has an 'any' type.

from debounce.

Just remove the curly brackets: import debounce from 'debounce'

Debounce has only a default export with module.exports, so you can't use the curly brackets to import certain functions or variables. Take a look at MDN.

from debounce.

@bsg62 doing what you've suggested also gives me the same error. Only
const debounce = require('debounce');
works correctly

from debounce.

@Szmiglo Okay, I think I have a solution. I was under the impression, that TypeScript imports work the same as ES6 imports, but that's not the case. My example from above works fine with ES6 and Webpack, but not with TS.

This should work: import * as debounce from 'debounce'

from debounce.

Still the same error :(

from debounce.

Well, okay, I'm blind. :D

The import works fine, but TypeScript can't find a type declaration for debounce.

You can either disable noImplicitAny in your TS config or create a definition, as suggested here.

from debounce.

In ts 3.0.3, when I try import { debounce } from "debounce"; I still get an error [ts] Module '"/Users/jonas/Documents/code/apex-pmd/node_modules/@types/debounce/index"' has no exported member 'debounce'..

If I update the types.d.ts file to look like this it works:

export declare function debounce<A extends Function>(f: A, interval?: number, immediate?: boolean): A & { clear(): void; };

from debounce.