coladb

A small library for using IndexedDB in Promise style. Wrap IDBRequest to Promise.

Installation

npm i coladb --save

Usage

Use as module:

import coladb from 'coladb'
 
async function openDB () {
 
  const db = await coladb.open('dbname', 1, (idb) => {
    const store = idb.createObjectStore('user', { autoIncrement: true, keyPath: 'id' })
    store.createIndex('uid', 'uid', { unique: true })
    store.createIndex('name', 'name')
    store.createIndex('birthday', 'birthday')
  })
 
  return db
}
 
async function insertUser (user = {}) {
  const db = await openDB()
  const transaction = db.transaction('user', 'readwrite')
  const store = transaction.objectStore('user')
  const id = await store.add(user)
}

Use as script in html file. Import dist/coladb.js to your project, export as global variable named colaDB:

<script src="path/to/coladb.js"></script>
<script>
async function main () {
 
  const db = await colaDB.open('dbname', 1, (idb) => {
    const store = idb.createObjectStore('user', { autoIncrement: true, keyPath: 'id' })
    store.createIndex('uid', 'uid', { unique: true })
    store.createIndex('name', 'name')
    store.createIndex('birthday', 'birthday')
  })
 
  const transaction = db.transaction('user', 'readwrite')
  const store = transaction.objectStore('user')
  const id = await store.add(user)
}
main()
</script> 

API

Contrast to native IndexedDB, the open method signature has a little different.

coladb.open(name: string, version?: number, onupgradeneeded?: onupgradeneededFn, onblocked?: onblockedFn)

type onupgradeneededFn = (db, oldVersion: number, newVersion: number) => void
type onblockedFn = (event) => void

Examples

Use Cursor:

const db = coladb.open('dbname', 1)
const transaction = db.transaction('user', 'readwrite')
const store = transaction.objectStore('user')
 
let cursor: any = await store.openCursor(IDBKeyRange.bound(1, 10))
cursor = await cursor.continue(8)
 
console.log(`key: ${cursor.key}, value: ${cursor.value}`)
 
const key = await cursor.update(user)

More example in test directory.

Development

dist

npm run dist

Lint

npm run lint

Test

npm run karma:start
npm run karma:run