Let's whip up a basic web app real quick – it shouldn't be too hard! We just want it to say "Hello World!" when we hit the root path. Let's begin:
const express = require('express');
const app = express();
app.get('/', (req, res) => {
res.send('Hello World!');
});
app.listen(3037);Now run it and navigate to http://127.0.0.1:3037 in your console – you should
get greeted with a friendly "Hello World!" message. Now let's walk through how
this works real quick – it's not very complicated.
First we create an instance of our express module named app. Then we tell
our app to send a "Hello World!" message when anyone hits the root path
(/). It might be a good time to note that the req parameter is short for
"request", or the request sent to use by the client, while the res parameter
is short for "response", or what we send back to the client. Finally, we tell
our app to listen on port 3037 at the bottom.
This is a very quick and dirty Express app, but we'll definitely continue adding on from here in order to create our final site.