[Solved] How to get momentJS into a ionic2 TS project without errors?

There shouldn’t be any need to install it as ambient. moment has typings in the registry.

$ npm install --save moment
$ typings install --save moment

in tsconfig.json:

"files": [
    "typings/main.d.ts",
   ...
]

when needed:

import * as moment from 'moment';
export class Foo {
  bar(instant:moment.Moment):void {
   // do things
  }
}