electron-json-config

Simply set and get configuration from a json file for your Electron app

This is the 2.x.x tree.
For 1.x.x code and documentation please refer to the 1.x.x tree.
See UPGRADE.md for an upgrade guide.

This package can only be used from the main process.

Installation

NPM

npm install --save electron-json-config@beta

yarn

yarn add electron-json-config@beta

Usage

CommonJS

const config = require('electron-json-config').factory();

config.set('foo', 'bar');
console.log(config.get('foo')); // bar

ES Modules

import { factory } from 'electron-json-config';

const config = factory();

config.set('foo', 'bar');
console.log(config.get('foo')); // bar

Documentation

Key

type Key = string | Array<string>;

A key can be :

• a classic string key
  eg: 'foo'
• a dotted string multi level key
  eg: 'foo.bar'
• an array of string representing a multi level key
  eg: ['foo', 'bar']

ConfigOptions

type ConfigOptions = {
  prettyJson?: {
    enabled: boolean;
    indentSize?: number;
  };
};

Options for creating and storing Config contents. Currently supports formatting the JSON file contents in a pretty, indented format for easy readability or editability.

prettyJson.identSize defaults to 2 if this option is enabled.

Storable

interface Storable {
  [key: string]: Storable | any;
}

factory(file?: string, key?: string, options?: ConfigOptions): Conf

Description:
Create an instance of Config and returns it.
If an instance with the same key exist, returns this instance instead.

If file is specified, the configuration will be saved to that file instead of the default app.getPath('userData') + '/config.json'.

If key is specified, the requested instance will be saved under une given key instead of the default userData.

Examples:

// file: app.getPath('userData') + '/config.json'
// key: 'userData'
factory();

// file: '/data/test.json'
// key: '/data/test.json'
factory('/data/test.json');

// file: '/data/test.json'
// key: 'test'
factory('/data/test.json', 'test');

// file: app.getPath('userData') + '/config.json'
// key: 'test'
factory(undefined, 'test');

// file: app.getPath('userData') + '/config.json'
// key: 'test'
// JSON stored in readable, indented format (with default 2 space tab)
factory(undefined, 'test', { prettyJson: { enabled: true }});

Parameters:

Name	Type	Default
file?	string	app.getPath('userData') + '/config.json'
key?	string	`key
options?	ConfigOptions	{ prettyJson: { enabled: false }}

Returns: void

Config

The config class is a set of wrappers and helpers providing access to configuration and file synchronization.

new Config(file: string, data: Storable, options?: ConfigOptions): Config

Parameters:

Name	Type
file	string
data	Storable
options?	ConfigOptions

Returns: Config

get file(): string

Description: Returns the name of the file the config is stored in.

Returns: string

all(): Storable

Description: Returns all the data currently saved.

Returns: Storable

delete(key: Key): void

Description: Removes the key and its value from the config file.

Parameters:

Name	Type
key	Key

Returns: void

deleteBulk(keys: Array<Key>): void

Description: Removes all the keys specified and theirs value from the config file.

Parameters:

Name	Type
keys	Array<Key>

Returns: void

get<T>(key: Key, defaultValue?: T): T | undefined

Description: Returns the value associated with the key, undefined otherwise. You can specify a default value returned in case the key does not exists.

Parameters:

Name	Type
key	Key
defaultValue?	T

Returns: T | undefined

has(key: Key): boolean

Description: Checks if a key exists.

Parameters:

Name	Type
key	Key

Returns: boolean

keys(key?: Key): Array<string>

Description: If key is omitted, returns an array containing all keys in the config file.
If key is provided, returns an array containing all sub keys in the key object.

Parameters:

Name	Type
key?	Key

Returns: Array<string>

purge(): void

Description: Removes all data from the config file.

Returns: void

set<T>(key: Key, value: Storable | T): void

Description: Sets a key with the specified value. Overwrites the value, if the key already exists.

Parameters:

Name	Type
key	Key
value	Storable | T

Returns: void

setBulk<T>(items: { [key:string]: Storable | T }): void

Description: Like .set() but sets multiple keys in a single call.

Parameters:

Name	Type
items	{ [key: string]: Storable | T }

Returns: void