idb-factory

Better window.indexedDB.

This module provides consistent, modern API to window.indexedDB. It's especially useful for testing environments when you need to open/delete a database multiple times.

For implementation details check its mere 100 lines of source.

Example

import { open, del } from 'idb-factory'

// open database with version 1 and create stores
open('mydb', 1, upgradeCallback).then((db) => {
  expect(db.version).equal(2)
  // use db ...
  // delete database
  return del(db)
})

function upgradeCallback(e) {
  e.target.result.createObjectStore('books', { keyPath: 'id' })  
  e.target.result.createObjectStore('magazines')  
}

API

open and del return Promise and handle blocked event by repeating operation after 100ms.

open(dbName, [version], [upgradeCallback])

import { open } from 'idb-factory'

(async () => {

// open "mydb1" v1, and create store and index
const db1 = await open('mydb1', 1, (e) => {
  if (e.oldVersion < 1) {
    const store = e.target.result.createObjectStore('books', { keyPath: 'isbn' })
    store.createIndex('by_title', 'title', { unique: true })
  }  
})

// version and upgradeCallback are optional.
const db2 = await open('mydb2')

})();

del(db)

import { open, del } from 'idb-factory'

(async () => {
const db = await open('mydb')

// do something with db
// ...

// delete existing IDBDatabase instance
await del(db)

})();

del(dbName)

import { del as deleteDatabase } from 'idb-factory'

(async () => {
await deleteDatabase('mydb') // delete database by name

})();

cmp(val1, val2)

import { cmp } from 'idb-factory'

// Compare 2 values, using IndexedDB's comparison algorithm
console.assert(cmp('z', 'a') === 1)
console.assert(cmp([1], [1]) === 0)

global.forceIndexedDB

It is a special global variable, which can be defined to prior global.indexedDB.

function idb() {
  return global.forceIndexedDB
      || global.indexedDB
      || global.webkitIndexedDB
      || global.mozIndexedDB
      || global.msIndexedDB
      || global.shimIndexedDB
}

For example, due to WebKit bug you can't rewrite window.indexedDB, but Safari 8 implementation is really buggy, so you'd like to use shim and fallback to WebSQL.

import 'indexeddbshim'
import { open } from 'idb-factory'

if (isSafari8) {
  global.forceIndexedDB = global.shimIndexedDB
}

(async () => {

// use WebSQL implementation, only in Safari 8,
// and use IndexedDB in remaining browsers.
const db = await open('mydb')

})();

LICENSE

MIT

treojs/idb-factory