A more convenient way to use storage through proxy.

try it on codesandbox.

npm i proxy-web-storage

Keep the type of storage value unchanged and change array and object directly.

import { local, session } from 'proxy-web-storage';

local.test = 'Hello proxy-web-storage'; // works
delete local.test; // works

// number
local.test = 0;
local.test === 0; // true

// boolean
local.test = false;
local.test === false; // true

// undefined
local.test = undefined;
local.test === undefined; // true

// null
local.test = null;
local.test === null; // true

// object
local.test = { hello: 'world' };
local.test.hello = 'proxy-web-storage'; // works

// array
local.test = ['hello'];
local.test.push('proxy-web-storage'); // works
local.test.length // 2

// Date
local.test = new Date('2000-01-01T00:00:00.000Z');
local.test.getTime() === 946684800000; // true

// RegExp
local.test = /d(b+)d/g;
local.test.test("cdbbdbsbz"); // true

// function
local.test = function() {
  return 'Hello proxy-web-storage!';
};
local.test() === 'Hello proxy-web-storage!'; // true

test is the key in localStorage. The value is also saved to localStorage. The local, session also have the same methods and properties: key(), getItem(), setItem(), removeItem(), clear() and length.

listen to the changes.

import { local } from 'proxy-web-storage';

local.on('test', function(newVal, oldVal) {
  console.log('test', newVal, oldVal);
});
local.on('test.a', function(newVal, oldVal) {
  console.log('test.a', newVal, oldVal);
});

local.test = {};
// test {} undefined

local.test.a = 1;
// test.a 1 undefined

Subscribe to an item.

• key: the name of the item to subscribe to. Support obj.a for Object and list[0] for Array.
• callback: the function to call when the item is changed. Includes newValue and oldValue.

Subscribe to an item only once.

• key: the name of the item to subscribe to. Support obj.a for Object and list[0] for Array.
• callback: the function to call when the item is changed. Includes newValue and oldValue.

Unsubscribe from an item or all items.

• key(optional): the name of the item to unsubscribe from. If no key is provided, it unsubscribes you from all items.
• callback(optional): the function used when binding to the item. If no callback is provided, it unsubscribes you from all functions binding to the item.

set expires for items.

import { local } from 'proxy-web-storage';

local.test = 'hello proxy-web-storage';
local.setExpires('test', Date.now() + 10000);

// within 10's
local.test // 'hello proxy-web-storage'

// after 10's
local.test // undefined

The expires is saved to localStorage. So no matter how you reload it within 10's, the value still exists. But after 10's, it has been removed.

set expires for an item.

• key: the name of the item to set expires.
• expires: accept string、number and Date.

return the expires(Date) of the item.

• key: the name of the item that has set expires.

cancel the expires of the item.

• key: the name of the item that has set expires.