create-slice-example1.js

import { createSlice, configureStore } from '@reduxjs/toolkit'

const todosSlice = createSlice({
  name: 'todos',
  initialState: [], 
  reducers: {
    addTodo(state, action) {
      const { id, text } = action.payload
      state.push({ id, text, completed: false })
    },
    toggleTodo(state, action) {
      const todo = state.find(todo => todo.id === action.payload)
      if (todo) {
        todo.completed = !todo.completed
      }
    }
  }
})

const store = configureStore({ reducer: todosSlice.reducer })