fix(overmind): fix typing of addMutationListener

Author: christianalfoni

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

@@ -13,6 +13,7 @@ import {
   useState,
   useLayoutEffect,
 } from 'react'
+import { IMutation } from 'proxy-state-tree'
 
 export type IReactComponent<P = any> =
   | StatelessComponent<P>
@@ -30,6 +31,7 @@ export type TConnect<Config extends Configuration> = {
   overmind: {
     state: TApp<Config>['state']
     actions: TApp<Config>['actions']
+    addMutationListener: (cb: (mutation: IMutation) => void) => () => void
   }
 }
 
@@ -40,6 +42,7 @@ export const createHook = <A extends Overmind<Configuration>>(
 ): (() => {
   state: A['state']
   actions: A['actions']
+  addMutationListener: (cb: (mutation: IMutation) => void) => () => void
 }) => {
   let currentComponentInstanceId = 0
   const {

packages/node_modules/overmind/src/index.ts

@@ -6,6 +6,7 @@ import {
   TTree,
   IMutation,
   VALUE,
+  IMutationCallback,
 } from 'proxy-state-tree'
 import { Derived } from './derived'
 import { Devtools, Message, safeValue, safeValues } from './Devtools'
@@ -436,7 +437,7 @@ export class Overmind<Config extends Configuration> implements Configuration {
   getMutationTree() {
     return this.proxyStateTree.getMutationTree()
   }
-  addMutationListener = (cb) => {
+  addMutationListener = (cb: IMutationCallback) => {
     return this.proxyStateTree.onMutation(cb)
   }
 }