LocalForage

Introduction

Offline storage, improved.

• Author: Mozilla

Usage

Official document

Sample code

By default, LocalForage selects backend drivers for the datastore in this order:

1. IndexedDB
2. WebSQL
3. localStorage

Save data

• Callback

  localforage.setItem(key, value, function(){ /* ... */ });
  

• Promise

  localforage.setItem(key, value)
      .then(function(value){ /* ... */ })
      .catch(function(err){ /* ... */ });
  

Read data

• Callback

  localforage.getItem(key, function(err, value){ /* ... */ });
  

• Promise

  localforage.getItem(key)
      .then(function(value){ /* ... */ })
      .catch(function(err){ /* ... */ });
  

Remove data

• Callback

  localforage.removeItem(key, function(){ /* ... */ });
  

• Promise

  localforage.removeItem(key)
      .then(function(value){ /* ... */ })
      .catch(function(err){ /* ... */ });