Add types

package.json

@@ -3,6 +3,7 @@
   "version": "1.0.2",
   "description": "FLIP animation helper; animate DOM changes with ease",
   "main": "dist/flippy.bundle.js",
+  "types": "src/index.d.ts",
   "keywords": [
     "flip",
     "animation"

src/index.d.ts

@@ -0,0 +1,29 @@
+declare module 'flippy.js' {
+  type Elements = Element|Array<Element>|String
+  interface Options {
+    callback: (elms: Elements) => any
+    duration: number
+    ease: string
+    animatingClass: string
+    scalingClass: string
+  }
+  interface FLIPOptions extends Options {
+    useScale: boolean
+    debug: boolean
+  }
+  export class FLIPElement {
+    constructor(elm: HTMLElement, options: FLIPOptions)
+    opts: FLIPElement
+    setOptions(options: FLIPElement): void
+    first(): FLIPElement
+    last(): FLIPElement
+    invert(): FLIPElement
+    play(): FLIPElement
+    stop(): FLIPElement
+    clean(): FLIPElement
+    finish(): FLIPElement
+    debug(): FLIPElement
+  }
+
+  export default function (elms: Elements, modifier: () => void, options?: Options): Promise<Array<Element>>
+}