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idb-factory

1.0.0 • Public • Published

idb-factory

Better window.indexedDB.

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

For implementation details check well documented 100 lines of the 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 returns Promise and handles blocked event, by repeating operation after 100ms.

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

import { open } from 'idb-factory'
 
// open "mydb1" v1, and create store and index
const db1 = async 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 = async open('mydb2')

You can combine it with idb-schema and have a pretty good deal.

import { open } from 'idb-factory'
import Schema from 'idb-schema'
 
const schema = new Schema()
.version(1)
  .addStore('books', { key: 'isbn' })
  .addIndex('byTitle', 'title', { unique: true })
.version(2)
  .addStore('magazines')
  .addIndex('byPublisher', 'publisher')
  .addIndex('byFrequency', 'frequency')
 
const db = async open('mydb', schema.version(), schema.callback())  

del(db)

import { open, del } from 'idb-factory'
const db = async open('mydb')
 
// do something with db
// ...
 
// delete existing IDBDatabase instance
async del(db)

del(dbName)

import { del as deleteDatabase } from 'idb-factory'
async 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 specially global variable, which you can define 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
}
 
// use WebSQL implementation, only in Safari 8,
// and use IndexedDB in remaining browsers.
const db = async open('mydb')

LICENSE

MIT

install

npm i idb-factory

Downloadsweekly downloads

7

version

1.0.0

license

MIT

homepage

github.com

repository

Gitgithub

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