ExpressJS.md

ExpressJS is a server framework for [[Javascript]] / [[NodeJS]]

To set up express JS for your node server. at the top of your code, add

npm i express

import express from 'express';

const app = express();

app.use(express.static("public"));

app.listen(3000, () => {
    console.log('Server is running on port 3000');
    });

The 3000 in the code is whatever port you want

app.get('/', (req, res) => {
    res.send('<h1>Sup Bitch</h1>');
    });

You can send [[html]] files as well

app.get('/', (req, res) => {
    res.sendFile(__dirname + 'index.html');
    });

form submissions must look like <form action="/" method="POST">

For example:

app.get('/', (req, res) => {

   let today = new Date();

   let currentDay = today.getDay();

    let day = "";

    write = res.write();

   if (today.getDay() === 1 || today.getDay() === 2) {

      res.write("<h1>Yay it's the weekend!</h1>");

    } else {res.sendFile(__dirname + "/weekday.html");}

    res.send();

    });

To make sure #__dirname works with [[body-parser]] ,use

import express from "express"
import {dirname} from "path"
import {fileURLToPath} from "url"
const __dirname = dirname(fileURLToPath(import.meta.url))