The custom declaration file for the 'react-dates' module could not be located

I've been struggling to create a custom declaration file for the 'react-dates' npm package, but I'm facing issues with the compiler not recognizing my declaration file.

Whenever I try to import

DateRangePicker from 'react-dates'
, I encounter the following error:

The compiler could not locate a declaration file for the 'react-dates' module. The file 'absolute_path/src/node_modules/react-dates/index.js' is implicitly assigned an 'any' type.

My declaration file is stored at '@types/react-dates/index.d.ts' and it's structured like this:

import * as React from 'react';
declare class DateRangePicker extends React.Component<{}, {}> { }

This is how my tsconfig.json file looks:

{
  "compilerOptions": {
    "outDir": "./dist/",
    "sourceMap": true,
    "noImplicitAny": true,
    "strictNullChecks": true,
    "module": "commonjs",
    "target": "es6",
    "jsx": "react",
    "typeRoots": [
      "./@types"
    ]
  },
  "include": [
    "./app/**/*",
    "./@types/**/*"
  ]
}

Answer №1

Resolved the issue by encapsulating it within a module declaration like so:

declare module 'react-dates' {
  import { Component } from 'react';
  export class DateRangePicker extends Component<{}, {}> { }
}

It is important to note that the import statements must be contained within the module block, otherwise an error will occur:

Invalid module name in augmentation. Module 'react-dates' resolves to an untyped module at 'path/node_modules/react-dates/index.js', which cannot be augmented.

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