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better-web-storage

Simple JSON local storage wrapper

Why? Because semantic, simple, no-deps, and non-clashing. I have yet to find anything that's easy, functional, and non-verbose at the same time, so I made this package.

Features include namespacing and utiltiy functions such as assign, each and map.

Usage

const BetterWebStorage = require('better-web-storage');

// uses local storage and sets keys prefixed with 'myapp'
const store = new BetterWebStorage({ local: true, prefix: 'myapp' });
const store2 = new BetterWebStorage({ local: true, prefix: 'otherapp' });

store.set('test', true);
store2.set('test', false);

localStorage
// > { "myapp_test": "true", "otherapp_test": "false" }

API

set(key, val)

Sets key to stringified val. When passed an object, it will iterate through the object and set key val to storage.

// Single value
store.set('test', true);

// Entire object
store.set({
    auth: 'abcdefgh',
    userId: 5,
    permissions: ['post:read']
});

get(keys)

Retrieves and parses stored key. When multiple values are passed, it returns an object of those keys' values.

store.get('test')
// > true

store.get('auth', 'userId');

// > {
//     auth: 'abcdefgh',
//     userId: 5
// }

has(key)

Returns true when key exists. Can pass multiple keys and it will return true if all keys exist.

store.has('test')
// > true

store.has('test', 'auth', 'permissions')
// > true

store.has('userId', 'password')
// > false

rmv(key)

Removes key. Can pass multiple keys to remove.

store.rmv('test', 'auth', 'permissions')

assign(key, val)

Object assigns val to key. Both val and key item must be an object.

store.set('obj', { a: true });
store.assign('obj', { b: true });

store.get('obj');
// > { a: true, b: true }

each(fn)

Iterates through store entries and executes a user-defined function. If storage is prefixed, it will only iterate through prefixed keys.

store.each((key, val) => alert(`${key} equals ${val}`));

map(fn)

Maps through store entries and executes a user-defined function. Returns an array of mapped items. If storage is prefixed, it will only iterate through prefixed keys.

const ids = store.map((key, val) => [key, val].join('-'));

clear()

Removes all keys. If your storage is prefixed, it will only remove the prefixed keys.

length

Returns length of keys. If your storage is prefixed, it will only give the length of prefixed keys

all

Returns all keys. If your storage is prefixed, it will only give return all prefixed keys.

Utility Functions

key(key)

Generates a key based on prefix

filterPrefixedKeys()

Returns an array of prefixed keys

strippedPrefix(keysArray)

Strips the prefix from keys

Development

If you want to develop for this library, nothing will be accepted without tests. Tests are ran using mocha and chai. This is a browser package, so all tests are made in browser;

To build project, run npm run build. To run tests, build first, then open test.html in your browser.