dotenv-ajv
dotenv-ajv is a JS/TS library use to load and validate your env files using JSON schema
Installation
npm i dotenv-ajv
Usage
First create a .env file
NODE_ENV=development
TOKEN=yourapptokenNext create JSON schema using typebox in a env.type.ts file
import {Static, Type} from "@sinclair/typebox"; // `npm i @sinclair/typebox` is required
export enum NodeEnv {
dev= 'development',
prod = 'production',
staging = 'staging'
}
export const EnvSchema = Type.Object({
NODE_ENV: Type.Enum(NodeEnv, {
default: NodeEnv.dev
}),
PORT: Type.String({
default: '3000'
}),
TOKEN: Type.String()
});
export type EnvType = Static<typeof EnvSchema>;
// Create this function if you want auto-complete
export function ENV(): EnvType {
return process.env as EnvType;
}Finally, in the index.ts load and validate your env file
import {loadAndValidateEnv} from "dotenv-ajv";
import {EnvSchema, ENV} from "./env.type.ts";
loadAndValidateEnv(EnvSchema); // Throws an error if your .env file isn't valid
// Now you can use the ENV function
console.log(ENV().PORT); // 3000
console.log(ENV().NODE_ENV); // development
console.log(ENV().TOKEN); // yourapptoken