How to fix it?

index.js

import Vue from 'vue' // Can not find module
import Vuex from 'vuex'
import axios from 'axios'

Vue.use(Vuex)

const store = () => new Vuex.Store({
state: {
todos: []
},
getters: {
allTodos (state) { //Parameter 'state' implicitly has an 'any' type.ts(7006)
return state.todos
},
activeTodos (state) {
return state.todos.filter(todo => !todo.completed)
},
completedTodos (state) {
return state.todos.filter(todo => todo.completed)
}
},
mutations: {
SETTODOS (state, todos) { state.todos = todos }, ADDTODO (state, todo) {
state.todos.push(todo)
},
REMOVETODO (state, todo) { var i = state.todos.indexOf(todo) state.todos.splice(i, 1) }, FILTERTODOS (state, value) {
state.todos.forEach((todo) => {
todo.completed = !value
})
}
},
actions: {
addTodo ({ commit }, todo) {
commit('ADDTODO', todo) }, setTodos ({ commit }, todos) { commit('SETTODOS', todos)
},
removeTodo ({ commit }, todo) {
commit('REMOVETODO', todo) }, allDone ({ state, commit }) { var value = state.todos.filter(todo => todo.completed).length === state.todos.length commit('FILTERTODOS', value)
},
saveTodos ({ state }) {
axios.put('/api/todos', { todos: state.todos })
},
nuxtServerInit ({ commit }, { req }) {
commit('SET_TODOS', req.session ? (req.session.todos || []) : [])
}
}
})

export default store