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javascriptnode.jstypescriptbluebird

Is there any way to promisify node's functions and get intellisense with Typescript?

I'm using @types definitions and added @types/bluebird, as expected I get autocomplete when using the methods from the library. However I would like to promisify node's functions (fs). I'm able to do that with the following line: 

import * as Promise from 'bluebird'
import * as fs from 'fs'

const fsPromisified = Promise.promisifyAll(fs)

The problem is that when I do fsPromisified I lose autocomplete.

Is there any way I can do this without having to wrap around node's functions myself with promises?

Solution

  • You can use the pre-promisified mz/fs instead of fs, which wraps all promisifies all async fs functions (with their original names, not the Async prefix). That package has TypeScript typings (@types/mz):

    import * as fs from 'mz/fs';

// e.g., read file
fs.readFile('somefile')
  .then((contents) => {
    // ...
  });