清空:
localStorage.clear()
存储数据:
localStorage.setItem(key,value)
localStorage.key = value
读取数据:
localStorage.getItem(key) :获取数据值
localStorage.key(i):获取第i个键值
删除某个变量:
localStorage.removeItem(key)
检查localStorage里是否保存某个变量:
localStorage.hasOwnProperty(key)
sessionStorage与localStorage用法类似,不同点在于,sessionStorage在浏览器关闭后自动清除,localStorage需要手动清除