typescript declare global

1declare global {
2    interface Window {
3        FB:any;
4    }
5}
6
7let FB = window.FB; // ok now

1ts// Type definitions for [~THE LIBRARY NAME~] [~OPTIONAL VERSION NUMBER~]
2// Project: [~THE PROJECT NAME~]
3// Definitions by: [~YOUR NAME~] <[~A URL FOR YOU~]>
4
5/*~ If this library is callable (e.g. can be invoked as myLib(3)),
6 *~ include those call signatures here.
7 *~ Otherwise, delete this section.
8 */
9declare function myLib(a: string): string;
10declare function myLib(a: number): number;
11
12/*~ If you want the name of this library to be a valid type name,
13 *~ you can do so here.
14 *~
15 *~ For example, this allows us to write 'var x: myLib';
16 *~ Be sure this actually makes sense! If it doesn't, just
17 *~ delete this declaration and add types inside the namespace below.
18 */
19interface myLib {
20  name: string;
21  length: number;
22  extras?: string[];
23}
24
25/*~ If your library has properties exposed on a global variable,
26 *~ place them here.
27 *~ You should also place types (interfaces and type alias) here.
28 */
29declare namespace myLib {
30  //~ We can write 'myLib.timeout = 50;'
31  let timeout: number;
32
33  //~ We can access 'myLib.version', but not change it
34  const version: string;
35
36  //~ There's some class we can create via 'let c = new myLib.Cat(42)'
37  //~ Or reference e.g. 'function f(c: myLib.Cat) { ... }
38  class Cat {
39    constructor(n: number);
40
41    //~ We can read 'c.age' from a 'Cat' instance
42    readonly age: number;
43
44    //~ We can invoke 'c.purr()' from a 'Cat' instance
45    purr(): void;
46  }
47
48  //~ We can declare a variable as
49  //~   'var s: myLib.CatSettings = { weight: 5, name: "Maru" };'
50  interface CatSettings {
51    weight: number;
52    name: string;
53    tailLength?: number;
54  }
55
56  //~ We can write 'const v: myLib.VetID = 42;'
57  //~  or 'const v: myLib.VetID = "bob";'
58  type VetID = string | number;
59
60  //~ We can invoke 'myLib.checkCat(c)' or 'myLib.checkCat(c, v);'
61  function checkCat(c: Cat, s?: VetID);
62}