Cannot resolve NPM module which seems to have installed successfully - module

Question

I have installed a few modules doing npm install --save ng2-redux redux redux-actions redux-promise. If I do npm list | grep "redux" I get:
├── ng2-redux#3.0.5
├─┬ redux#3.5.2
├─┬ redux-actions#0.12.0
├─┬ redux-promise#0.5.3
And in my package.json I can find them as well:
"dependencies": {
...
"ng2-redux": "3.0.5",
"redux": "3.5.2",
"redux-actions": "0.12.0",
"redux-promise": "0.5.3",
...
}
The problem is that while ng2-redux and redux both work fine:
import { applyMiddleware } from 'redux';
import { NgRedux, select } from 'ng2-redux';
redux-actions and redux-promise both throw a Cannot resolve file 'redux-actions'/'redux-promise' when trying to import them, that appears both in the IDE (WebStorm 11.0.4) and in Webpack:
import { createAction } from 'redux-actions';
import promiseMiddleware from 'redux-promise';
The errors says:
ERROR in ../src/.../app.component.ts
(8,31): error TS2307: Cannot find module 'redux-promise'.
However...
import 'redux-actions';
import 'redux-promise';
...works just fine.
I have already tried to remove the node_modules folder and reinstall everything with npm cache clear, rm -rf node_modules and npm install and it doesn't fix the problem.

Answer 1

You should also have d.ts file under node_modules directory. Try
npm install --save-dev #types/redux-promise
to acquire the type information of the module.