Add TypeScript 2 support

[likerRr]

No description provided.

[hustcc]

I have never use TypeScript.

What's the meaning of code <reference types="jquery" />?

[likerRr]

Typescript is typed (optionally) language and for better support we should help ts' compiler with typings. Literaly saying it allows typescript use jquery selector as a parameter for render method. You can see a line:

render<T>(nodes: Node|NodeList|JQuery, locale?: string): void;

That means render method can accept a single node (Node), an array of nodes (NodeList) or a jquery selector (JQuery). But unlike Node and NodeList which are native constructors, typescript know nothing about JQuery (because it's not native constructor).

By doing this <reference types="jquery" />, we are saying to ts compiler: "man, this file depends on jquery typings and probably there you can find definition of JQuery constructor". "Probably" - because it could be several references. Also we include this definition for jquery as a dependency: @types/jquery": "^2.0.40. Don't worry, this dependency will be installed by the client (by doing npm install) but it will never be included in project sources.

Typescript definitions are only files that help ts' compiler understand which libraries are in project.

[hustcc]

Got it.