persistentjs

Use universal api to operate cookie,localStorage and sessionStorage

Install

$ npm i ic-persistentjs || yarn add ic-persistentjs

Usage

We export an object contains three props: ls(localStorage), ss(sessionStorage), cookie and we also export ls, ss, cookie independently.

import persistent, { ls, ss, cookie } from 'ic-persistentjs'

api

• ls.setItem(key, value, options)
• ss.setItem(key, value, options)

  use it same as native setItem on localStorage, but we enhanced it by passing an options as the third param.

If you want to persist some special data type like RegExp、 Date and Function, you can set options.isJSON to false.

ls.setItem(
  'special',
  {
    date: new Date(),
    regexp: /test/,
    fn: function() {}
  },
  { isJSON: false }
)

options.expires

How long the cookie is expired. It can be a string, number and Date.

string:

cookie.setItem('name', 'tom', {
  expires: '7d' // '7days' or '7day'
})

available semantic string as below:

• 'years/year/yrs/yr/y'
• 'weeks/week/w'
• 'days/day/d'
• 'hours/hour/hrs/hr/h'
• 'minutes/minute/mins/min/m'
• 'seconds/second/secs/sec/s'
• 'milliseconds/millisecond/msecs/msec/ms'

number:

cookie.setItem('name', 'tom', {
  expires: 7 // represent 7 days, as the same as '7days'|'7day'|'7d'
})

Date:

cookie.setItem('name', 'tom', {
  expires: new Date(2088, 08, 08) // represent 7 days, as the same as '7days'|'7day'|'7d'
})

options.path

options.domain

options.secure

More informations about these options above, see here.

getItem(key)

Get a json data with the key, or get all data without key(only available when type is cookie).

// return null when not found the value of the key.
ls.getItem('name')
ss.getItem('name')

// return a empty object when not found the value of the key.
cookie.setiItem('name', 'test')
cookie.setiItem('obj', {
  name: 'test',
  age: 30
})
cookie.getItem('name') // output: 'test'
cookie.getItem() // output: {name: 'test', obj: { name: 'test, age: 30 }}

removeItem(key, options)

options is available only when called on cookie.

ls.removeItem('name')
ss.removeItem('name')

cookie.removeItem('name', {
  path: '/path',
  domain: 'sub.domain.com'
})

clear()

remove all data.

owner.clear()

key(index)

the same as the key method of localStorage.

owner.index(0)

length

like the length property of localStorage.

owner.length

Note: owner is ls or ss or cookie.