Using moment.js in Angular 2 typescript application

Question

I'm struggling in using moment.js library inside an Angular 2 Typescript app. Even after reading the answer to this question I can't get it to work.

This is what I did so far:

• I installed moment.js using npm, so I can find the library under node_modules/moment/moment.js

• I configured System.js to retrieve moment library:

  System.config({
      packages: {
        app: {
          format: 'register',
          defaultExtension: 'js'
        },
        moment: {
          main: 'moment.js',
          type: 'cjs',
          defaultExtension: 'js'
        }
      },
      map: {
        moment: 'node_modules/moment'
      }
  });
  

• I installed typescript typings with typings install moment-node --ambient --save and typings install moment --ambient --save, so I can see the correct typings inside typings/main/ambient/moment-node and typings/main/ambient/moment

Now, if in my code I use import * as moment from 'moment'; typescript compilation run smooth and I can see the correct suggestion inside Atom editor (if I start with moment(). I can see year(), month(), etc.). However if I run my code inside the browser, it gives an error saying that 'moment is not a function' (debugging I can see that moment is an object with lots of methods).

If I write import moment from 'moment'; the code in the browser runs fine, however typescript compilation fails with 'module moment has no default export' and I can't get any suggestion from Atom while writing code.

What am I doing wrong? What's the correct way to import moment.js (and any non typescript library) inside an Angular 2 typescript application?

Answer 1

import * as moment_ from 'moment';
const moment:moment.MomentStatic = (<any>moment_)['default'] || moment_;