config-xyz

A configuration manager for NodeJS. support nodejs & typescript

• dot prop set/get
• updated event listener
• load values from .js/yml/json files.

break changes

• 2.0.0

  • Config is not extends EventEmitter2 any more, use Config.prototype.events instead. EventEmitter2 instance will be initialized called first time (listen any events)

Note

load values from .js file:

• ignore require.cache
• load js files with vm2 (default), or provide an option { loadJsFileWithVm: false } to skip it.
• if load with vm2
  • cannot require any module or access any global variables, but only process.env

install

npm install config-xyz --save
// yarn add config-xyz

Usage

more examples are in src/tests/test_config.ts

import { ConfigUpdateEvent, Config } from 'config-xyz';

const config = new Config()
config.set('xxx', 1)
config.merge({ 'yyy': 1 })

assert.strictEqual(1, config.get('xxx'))
assert.strictEqual(1, config.get('not exist and return default', 1))
config.set('xxx.aaa', 1)
assert.strictEqual(1, config.get('xxx.aaa'))
assert.strictEqual(1, config.get('xxx').aaa)

// Event
config.on('update', (e: ConfigUpdateEvent) => {
    assert.strictEqual('xxx.aa', e.key)
    assert.strictEqual(1, e.value)
})
// wild Event powered by Eventemitter2
config.on('update:xxx.**', (e: ConfigUpdateEvent) => {
    assert.strictEqual('xxx.aa', e.key)
    assert.strictEqual(1, e.value)
})
config.set('xxx.aa', 1)

API

export class Config {
    /**
     * load config from file sync.
     * support .json .y(a)ml .js
     *
     * @param {string} path
     * @param {Partial<LoadFileOption>} [opt]
     * @memberof Config
     */
    loadFromFile (path: string, opt?: Partial<LoadFileOption>) : this
    /**
     * mrege values
     *
     * @param {{ [k: string]: any }} obj
     * @param {string} [namespace]
     * @memberof Config
     */
    merge (obj: { [k: string]: any }, namespace?: string) : this
    set (key: string, value: any): this
    has (key: string): boolean
    get<T=any> (key: string): T | undefined
    get<T=any> (key: string, defaultValue: T): T
    getAsString (key: string, defaultValue?: string) : string
    getAsNumber (key: string, defaultValue?: number) : number
    getAsIneger (key: string, defaultValue?: number) : number
}