fix(overmind-react): trying to fix typing

Author: christianalfoni

packages/node_modules/overmind-react/src/index.ts

@@ -22,13 +22,6 @@ export type IReactComponent<P = any> =
   | react.ComponentClass<P>
   | react.ClassicComponentClass<P>
 
-// Diff / Omit taken from https://github.com/Microsoft/TypeScript/issues/12215#issuecomment-311923766
-type Omit<T, K extends keyof T> = Pick<
-  T,
-  ({ [P in keyof T]: P } &
-    { [P in K]: never } & { [x: string]: never; [x: number]: never })[keyof T]
->
-
 function getFiberType(component) {
   if (component.type) {
     // React.memo
@@ -78,7 +71,7 @@ const useCurrentComponent = () => {
     : {}
 }
 
-const useState = <Context extends IContext<{}>>(
+const useState = <Context extends IContext<{ state: {} }>>(
   cb?: (state: Context['state']) => any
 ): Context['state'] => {
   const overmind = react.useContext(context) as Overmind<any>
@@ -182,7 +175,9 @@ const useState = <Context extends IContext<{}>>(
   return state
 }
 
-const useActions = <Context extends IContext<{}>>(): Context['actions'] => {
+const useActions = <
+  Context extends IContext<{ actions: {} }>
+>(): Context['actions'] => {
   const overmind = react.useContext(context) as Overmind<any>
 
   if (!(overmind as any).mode) {
@@ -192,7 +187,9 @@ const useActions = <Context extends IContext<{}>>(): Context['actions'] => {
   return overmind.actions
 }
 
-const useEffects = <Context extends IContext<{}>>(): Context['effects'] => {
+const useEffects = <
+  Context extends IContext<{ effects: {} }>
+>(): Context['effects'] => {
   const overmind = react.useContext(context) as Overmind<any>
 
   if (!(overmind as any).mode) {
@@ -202,7 +199,9 @@ const useEffects = <Context extends IContext<{}>>(): Context['effects'] => {
   return overmind.effects
 }
 
-const useReaction = <Context extends IContext<{}>>(): IReaction<Context> => {
+const useReaction = <Context extends IContext<{ state: {} }>>(): IReaction<
+  Context
+> => {
   const overmind = react.useContext(context) as Overmind<any>
 
   if (!(overmind as any).mode) {
@@ -217,24 +216,24 @@ export interface StateHook<Context extends IContext<{}>> {
   <T>(cb?: (state: Context['state']) => T): T
 }
 
-export const createStateHook: <Context extends IContext<{}>>() => StateHook<
-  Context
-> = () => useState
+export const createStateHook: <
+  Context extends IContext<{ state: {} }>
+>() => StateHook<Context> = () => useState
 
 export const createActionsHook: <
-  Context extends IContext<{}>
+  Context extends IContext<{ actions: {} }>
 >() => () => Context['actions'] = () => {
   return useActions as any
 }
 
 export const createEffectsHook: <
-  Context extends IContext<{}>
+  Context extends IContext<{ effects: {} }>
 >() => () => Context['effects'] = () => {
   return useEffects as any
 }
 
 export const createReactionHook: <
-  Context extends IContext<{}>
+  Context extends IContext<{ state: {} }>
 >() => () => IReaction<Context> = () => {
   return useReaction as any
 }