Added typescript definitions

config/storybook-addon-knobs.d.ts

@@ -0,0 +1,29 @@
+declare module 'storybook-addon-knobs' {
+  import WrapStory from "../src/components/WrapStory.js";
+
+  interface KnobOption<T> {
+    value: T,
+    type: 'text' | 'boolean' | 'number' | 'object' | 'select' | 'date',
+  }
+
+  interface StoryContext {
+    kind: string,
+    story: string,
+  }
+
+  export function knob<T>(name: string, options: KnobOption<T>): T;
+
+  export function text(name: string, value: string): string;
+
+  export function boolean(name: string, value: boolean): boolean;
+
+  export function number(name: string, value: number): number;
+
+  export function object(name: string, value: Object): Object;
+
+  export function select<T>(name: string, options: { [s: string]: T }, value: string): T;
+
+  export function date(name: string, value: Date = new Date(0));
+
+  export function withKnobs(storyFn: Function, context: StoryContext): WrapStory;
+}