Adds strict mode for the commonjs

README.md

@@ -86,7 +86,7 @@ store.setState(() => {
 store.getState() // { counter: 1 }
 ```
 
-But you can also subscribe a single event
+But you can also subscribe to a specific event:
 
 ```js
 const store = killa({ counter: 0, type: '', filter: '' })
@@ -124,6 +124,7 @@ store.getState() // { counter: 1, type: '', filter: '' }
 
 ```jsx
 import killa, { useStore } from 'killa'
+
 const store = killa({ counter: 0, type: '', filter: '' })
 
 const Counter = () => {
@@ -135,8 +136,8 @@ const Counter = () => {
     }
   })
 
-  const handleCounter = () => {
-    setState(() => {
+  const handleCounter = (e) => {
+    setState((state) => {
       return {
         ...state,
         counter: state.counter + 1

esbuild.config.js

@@ -42,7 +42,12 @@ const buildForBrowser = async () => {
 }
 
 const init = async () => {
-  buildForCustomEnvironment({ format: 'cjs' })
+  buildForCustomEnvironment({
+    format: 'cjs',
+    banner: {
+      js: '"use strict"'
+    }
+  })
   buildForCustomEnvironment({ format: 'esm' })
   buildForBrowser()
 }

src/core.js

@@ -64,3 +64,5 @@ export const createStore = (initialState = {}, options = {}) => {
 
   return Object.freeze(store)
 }
+
+export default createStore

src/index.js

@@ -1,6 +1,2 @@
-import { createStore } from './core'
-import { useStore } from './react'
-
-export { createStore, useStore }
-
-export default createStore
+export { default, createStore } from './core'
+export { useStore } from './react'

src/react.js

@@ -7,9 +7,7 @@ import { SYMBOL_STORE } from './utils/constants'
 
 const useSyncExternalStore = useSyncExternalStoreExports.useSyncExternalStoreWithSelector
 
-const _selector = (state) => state
-
-export const useStore = (store, selector = _selector) => {
+export const useStore = (store, selector = (state) => state) => {
   if (store.STORE !== SYMBOL_STORE) throw new Error('Provide a store valid for killa.')
 
   const state = useSyncExternalStore(