Appsettings json config loader

A simple tool to load config data

This allows you to automatically map environment variables typed into your application.

By overwriting the saved file during the build (CLI, intended for Frontend applications)
By setting the values at runtime (import, intended for Backend applications)

Install

# with npm
npm install @ljobse/appsettings-loader

# or with Yarn
yarn add @ljobse/appsettings-loader

CLI

The CLI allows you to overwrite properties in the json file from the current process.env context.

$ appsettings-loader ./config/appsettings.json

Lib

The library allows you to load the current process.env variables into an imported js(on) object.

var newSettings = applyEnvConfig(require("./config/appsettings.json"));

Nesting is supported by dot separation . and double underscores __.
Types are inherited
Case insensitive
Omits underscores _

Real world example

Environment on cloud provider or locally is set with the variables you need to load into your application.

#process.env

DATABASE_NAME=server_db

//# src/config/config.json
{
  "databaseName": "postgres"
}

//# src/config/index.ts

import { applyEnvConfig } from "@ljobse/appsettings-loader";
import appsettings from "./config.json";

const config = applyEnvConfig(appsettings);

export { config };

//# src/app.ts

import { config } from "./config";

console.log(config.databaseName);
// => "server_db"