reference :=> doc
There are a few ways to use environment variables in Deno:
The Deno runtime offers built-in support for environment variables with Deno.env.
Deno.env has getter and setter methods. Here is example usage:
Deno.env.set("FIREBASE_API_KEY", "examplekey123"); Deno.env.set("FIREBASE_AUTH_DOMAIN", "firebasedomain.com");
console.log(Deno.env.get("FIREBASE_API_KEY")); // examplekey123 console.log(Deno.env.get("FIREBASE_AUTH_DOMAIN")); // firebasedomain.com
You can also put environment variables in a .env file and retrieve them using dotenv in the standard library.
Let's say you have an .env file that looks like this:
PASSWORD=Geheimnis
To access the environment variables in the .env file, import the config function from the standard library. Then, import the configuration using the config function.
import { config } from "https://deno.land/std/dotenv/mod.ts";
const configData = await config(); const password = configData["PASSWORD"];
console.log(password); // "Geheimnis"
The Deno standard library has a std/flags module for parsing command line arguments.
import { load } from 'https://deno.land/[email protected]/dotenv/mod.ts'; /* DOTENV */
Deno.env.set('SOME_VAR', 'Value');
Deno.env.get('SOME_VAR'); // outputs "Value"
Deno.env.delete('SOME_VAR'); // outputs "undefined"
Deno.env.get('SOME_VAR'); // outputs "undefined"
const env = Deno.env.toObject(); // Record<string, string> // will contain all envs