WebStorage object API

API providing 2 way binding of JavaScript objects to browser WebStorage API consists of two mechanisms, each is used to bind and persist any JavaScript object to specific WebStorage type:

• LocalStorageObject -> localStorage
• SessionStorageObject -> sessionStorage

Getting started

Include with script tag:

<script src="dist/web-storage-object.min.js"></script>

or if you prefer NPM:

npm install web-storage-object

and include as:

import {LocalStorageObject, SessionStorageObject} from 'web-storage-object'

Examples

Basic usage

Given the simple object representing our data we can use the API like this:

var heroModel = {
  name: 'Ogox',
  weapon: 'Axe',
  horse: true,
  armor: {
    head: 'Steel Helmet',
    body: 'Rags',
    boots: 'Wraps'
  }
}
var ogox = new LocalStorageObject(heroModel, 'ogox')

Now if you check localStorage inside dev tools of your browser you will see:

Now if we modify any ogox weapon property, lets say like this:

ogox.weapon = 'Heavy Axe'

The changes will be automatically persistant and changed inside localStorage. You can check your dev tools again. Also if you do:

console.log(ogox)
console.log(ogox.weapon)

As you can see it behaves just as any other object except with help of JavaScript Proxy object changes are saved and fetched from WebStorage.

Use sessionStorage

To use sessionStorage call the SessionStorageObject constructor.

var ogox = new SessionStorageObject(heroModel, 'ogox')

Nested objects

It also works out of the box with nested object properties like:

ogox.armor.body = 'Heavy Armor' // updates property inside browser storage

Just like any JavaScript object

You can define new properties just like with any JS object:

ogox.armor.hands = 'Shoulder Plates'
ogox.level = 42

It also supports arrays and key => value syntax

ogox.items = [
  'carrot',
  'spoon',
  'rotten meat'
]
console.log(ogox.items[1]) // prints 'spoon' to console

Handling data already written inside browser storage

Let's say you already have some data for the given key saved to storage and you just want to load that. You can do it like this:

var ogox = new LocalStorageObject({}, 'ogox', false) // overwrite flag set to false

If overwrite flag is set to false and no data exists in Storage then in this case constructor would return empty LocalStorageObject object.

Delete properties

You can use delete operator to delete properties, this will delete property and sync webStorage:

delete ogox.armor.hands
delete ogox.level

Build your own

You can use files inside /dist folder or build your own.

$ git clone https://github.com/capJavert/web-storage-object.git
$ web-storage-object
$ npm install

Build scripts are:

$ npm run build

or minified version:

$ npm run build_prod

TODO

• Nested objects support
• Array support - Solved by adding nested object support, JS arrays are objects with special behaviour and Proxy handles them the same way
• Nested Array support - Solved with previous point
• abstract to WebStorageObject and provide SessionStorageObject and LocalStorageObject
• Add support for delete operator
• Add support for Object.hasOwnProperty