localStorage的增删改查

 var _localStorage = window.localStorage;
 undefined
 /* 增 */
 _localStorage.name = '张泰松'
 "张泰松"
 _localStorage['age'] = 28
 28
 _localStorage.setItem('address','杭州市西湖区')
 undefined
 /* 改 */
 _localStorage.name = '张泰松1'
 "张泰松1"
 _localStorage['age'] = 29
 29
 _localStorage.setItem('address','杭州市西湖区1')
 undefined
 /* 查 */
 _localStorage.age
 "29"
 _localStorage['name']
 "张泰松1"
 _localStorage.getItem('address')
 "杭州市西湖区1"
 /* 删 */
 delete _localStorage.name
 true
 delete _localStorage['age']
 true
 _localStorage.removeItem('address')
 undefined