cnpm i good-storage --save

import storage from 'good-storage'

const SEARCH_KEY = '__search__'
const SEARCH_MAX_LENGTH = 15

// compare:findindex傳入的是function,所以不能直接傳val
function insertArray(arr, val, compare, maxLen) {
 const index = arr.findIndex(compare)
 if (index === 0) {
 return
 }
 if (index > 0) {
 arr.splice(index, 1)
 }
 arr.unshift(val) // 插入到數(shù)組最前
 if (maxLen && arr.length > maxLen) {
 arr.pop() // 刪除末位元素
 }
}

// 存儲搜索歷史
export function saveSearch(query) {
 let searches = storage.get(SEARCH_KEY, [])
 insertArray(searches, query, (item) => {
 return item === query
 }, SEARCH_MAX_LENGTH)
 storage.set(SEARCH_KEY, searches)
 return searches
}
// 加載本地緩存的搜索歷史
export function loadSearch() {
 return storage.get(SEARCH_KEY, [])
}

import * as types from './mutation-types'
import {saveSearch} from 'common/js/cache'

export const saveSearchHistory = function({commit, state}, query) {
 commit(types.SET_SEARCH_HISTORY, saveSearch(query))
}

import {mapActions} from 'vuex'

// methods內(nèi):
 saveSearch() {
  this.saveSearchHistory(this.query)
 },
 ...mapActions([
  'saveSearchHistory'
 ])