bkv - simple KV storage for browsers

bkv is browser persistent key/value storage with simple interface. It supports actual IndexedDB / localStorage. With silent fallback to memory store for error-less work (optional).

Install

npm install bkv --save

Examples

const bkv = new window.BKV()

await bkv.set('dolorem', { lorem: 'ipsum' })

const data = await bkv.get('dolorem')
console.log(`Loaded: ${data}`)

await bkv.remove('dolorem'));

API

Note, all methods with optional callbacks will return promises if callback is not set.

new BKV([options])

Options:

• prefix - Data namespace. Default - bkv. Used to separate data for multiple instances, if required.
• stores - Array of storage names to use, ordered by preference. Default ['indexeddb', 'localstorage', 'zero']. Set to ['indexeddb', 'localstorage'] if no fallback to memory required.

* zero is simple memory store for silent fallback when no persistent storages available.

.get(key [, default]) => Promise

Load data by key name. If not exists - returns default (if passed) or undefined.

.getAll() => Promise

Load all data from storage as [ { key, value }, { key, value }, ... ].

.set(key, data [, ttl]) => Promise

Put data into storage under key name.

• key - String to address data.
• data - serializable JS object to store.
• ttl - Expiration time in seconds. Default = 0 (don't expire).

.remove(key | [keys]) => Promise

Remove key data from store. If Array passed - remove all listed keys.

.clear([expiredOnly]) => Promise

Clear all storage data (in your namespace), or just expired objects when called with true param.

.init() => Promise

Auto-executed on first call of any method. Usually not needed. But may be used, if you need exact info about availability of persistent storage, prior to start.

.create(options)

Alias of new BKV(options)

.shared(options)

Similar to .create() but returns the same (cached) instance for the same options. Useful if you need BKV in multiple modules, and don't wish to initialize it every time.