title: “Get started, hello world!” description: We will create a very simple web application with one route and returning the text hello-world. image: https://fastro.dev/static/image.png author: Yanu Widodo date: 07/06/2023

Prerequisites

Make sure you have Deno installed. This is required to run JS and TS code. With the --version argument below, you will know what version is installed.

Execute this command:

> deno --version

You will see the response

deno 1.35.0 (release, x86_64-apple-darwin)
v8 11.6.189.7
typescript 5.1.6

If not, you can read this page for detailed instruction.

Let’s start coding

Okay, after deno installed to your computer, this is the perfect time to play. Create a folder for your project.

> mkdir my-project

Enter to the folder

> cd my-project

Create a main.ts file for deno-cli entry point.

> touch main.ts

Open the created file with vi or your favorite editor

> vi main.ts

Copy and paste the code below

import fastro from "https://deno.land/x/fastro/mod.ts";

const f = new fastro();

f.get("/", () => "Hello, World!");

await f.serve();

Save the file. And run the app

> deno run -A main.ts

Please note, the -A argument allows deno to access all permissions.

If there are no problems, you will see this message in the terminal.

Listening on http://localhost:8000

Open that link on your browser or hit them via curl

> curl http://localhost:8000

You will see the response

Hello world