JS项目中对本地存储进行二次的封装的实现

function login() {
    //...请求
    const userInfo = {userId: 123, userName: '张三'}
    sessionStorage.setItem('userInfo', JSON.stringify(userInfo))
}
function getUserInfo() {
    return jsON.parse(sessionStorage.getItem('userInfo'))
}

export const USER_INFO = 'userInfo'

class Session {
  constructor() {
    this.store = window.sessionStorage
  }
  set(key, value) {
    this.store.setItem(key, value)
  }
  get(key) {
    return this.store.getItem(key)
  }
  clear(key) {
    this.store.removeItem(key)
  }
  clearAll() {
    this.store.clear()
  }
}

import { USER_INFO } from './constant-storage'
class Session {
  constructor() {
    this.store = window.sessionStorage
  }
  set(key, value) {
    this.store.setItem(key, value)
  }
  get(key) {
    return this.store.getItem(key)
  }
  clear(key) {
    this.store.removeItem(key)
  }
  clearAll() {
    this.store.clear()
  }

  // 用户信息
  getUserInfo() {
    const userInfo = this.get(USER_INFO)
    return userInfo ? JSON.parse(userInfo) : null
  }
  setUserInfo(userInfo) {
    this.set(USER_INFO, JSON.stringify(userInfo))
  }
  clearUserInfo() {
    this.clear(USER_INFO)
  }
}

const session = new Session()

export default session

import session from './session'
function login() {
    //...请求
    const userInfo = {userId: 123, userName: '张三'}
    session.setUserInfo(userInfo)
}
function getUserInfo() {
    return session.getUserInfo()
}