Easily write and read user settings in Electron apps
JavaScript
Latest commit ed3e6fc Jan 8, 2017 @jviotti committed on GitHub Merge pull request #44 from jviotti/upgrade-dependencies
Upgrade dependencies

README.md

electron-json-storage

Easily write and read user settings in Electron apps

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Electron lacks an easy way to persist and read user settings for your application. electron-json-storage implements an API somehow similar to localStorage to write and read JSON objects to/from the operating system application data directory, as defined by app.getPath('userData').

Installation

Install electron-json-storage by running:

$ npm install --save electron-json-storage

You can require this module from either the main or renderer process (with and without remote).

Documentation

storage.get(key, callback)

If the key doesn't exist in the user data, an empty object is returned. Also notice that the .json extension is added automatically, but it's ignored if you pass it yourself.

Passing an extension other than .json will result in a file created with both extensions. For example, the key foo.data will result in a file called foo.data.json.

Kind: static method of storage
Summary: Read user data
Access: public

Param Type Description
key String key
callback function callback (error, data)

Example

const storage = require('electron-json-storage');

storage.get('foobar', function(error, data) {
  if (error) throw error;

  console.log(data);
});

storage.getMany(keys, callback)

This function returns an object with the data of all the passed keys. If one of the keys doesn't exist, an empty object is returned for it.

Kind: static method of storage
Summary: Read many user data keys
Access: public

Param Type Description
keys Array.<String> keys
callback function callback (error, data)

Example

const storage = require('electron-json-storage');

storage.getMany([ 'foobar', 'barbaz' ], function(error, data) {
  if (error) throw error;

  console.log(data.foobar);
  console.log(data.barbaz);
});

storage.getAll(callback)

This function returns an empty object if there is no data to be read.

Kind: static method of storage
Summary: Read all user data
Access: public

Param Type Description
callback function callback (error, data)

Example

const storage = require('electron-json-storage');

storage.getAll(function(error, data) {
  if (error) throw error;

  console.log(data);
});

storage.set(key, json, callback)

Kind: static method of storage
Summary: Write user data
Access: public

Param Type Description
key String key
json Object json object
callback function callback (error)

Example

const storage = require('electron-json-storage');

storage.set('foobar', { foo: 'bar' }, function(error) {
  if (error) throw error;
});

storage.has(key, callback)

Kind: static method of storage
Summary: Check if a key exists
Access: public

Param Type Description
key String key
callback function callback (error, hasKey)

Example

const storage = require('electron-json-storage');

storage.has('foobar', function(error, hasKey) {
  if (error) throw error;

  if (hasKey) {
    console.log('There is data stored as `foobar`');
  }
});

storage.keys(callback)

Kind: static method of storage
Summary: Get the list of saved keys
Access: public

Param Type Description
callback function callback (error, keys)

Example

const storage = require('electron-json-storage');

storage.keys(function(error, keys) {
  if (error) throw error;

  for (var key of keys) {
    console.log('There is a key called: ' + key);
  }
});

storage.remove(key, callback)

Notice this function does nothing, nor throws any error if the key doesn't exist.

Kind: static method of storage
Summary: Remove a key
Access: public

Param Type Description
key String key
callback function callback (error)

Example

const storage = require('electron-json-storage');

storage.remove('foobar', function(error) {
  if (error) throw error;
});

storage.clear(callback)

Kind: static method of storage
Summary: Clear all stored data
Access: public

Param Type Description
callback function callback (error)

Example

const storage = require('electron-json-storage');

storage.clear(function(error) {
  if (error) throw error;
});

Support

If you're having any problem, please raise an issue on GitHub and I'll be happy to help.

Tests

Run the test suite by doing:

$ npm test

Contribute

Before submitting a PR, please make sure that you include tests, and that jshint runs without any warning:

$ npm run-script lint

License

The project is licensed under the MIT license.