How to include or create custom type definitions

Custom Type Definitions

When including 3rd party modules you also need to include the type definition for the module if they don't provide one within the module. You can try to install it with typings

typings install node --save

If you can't find the type definition in the registry we can make an ambient definition in this file for now. For example

declare module "my-module" {
  export function doesSomething(value: string): string;
}

If you're prototying and you will fix the types later you can also declare it as type any

declare var assert: any;

If you're importing a module that uses Node.js modules which are CommonJS you need to import as

import * as _ from 'lodash'

You can include your type definitions in this file until you create one for the typings registry see https://github.com/typings/registry