# ExpressJS

- Clone the project
- [e-mail]:icesplendent/TutorialExpress.git

## Prerequisite

- What we need
- nodemon
- express
- cors
- cross-env
- dotenv
- uuid
- moment

## Get Started

const express = require('express');

const app = new express();

const PORT = process.env.PORT || 8000;

app.listen(PORT, () => console.log(`Server is running at PORT ${PORT}`))

## Set Static folder

app.use(express.static(path.join(__dirname, 'public')));

## Middleware

// middleware
const logger = (req, res, next) => {
    console.log(`${req.protocol}://${req.get("host")}${req.originalUrl}`);
    next(); // the next function to go
};

// Init middleware
app.use(logger);

## [Body Parser](https://ithelp.ithome.com.tw/articles/10241083)

app.use(express.json());

## Learn from the Code

app.get("/api/member/:id", (req, res) => {
    const found = member.some((x) => x.id === parseInt(req.params.id));

    if (found) {
        res.json(
            member.filter((member) => member.id === parseInt(req.params.id))
        );
    } else {
        res.status(400).json({ msg: `no id with ${req.params.id}` });
    }
});

- `:id`: a URL parameter
- `req.params.id` returns a `String`. Convert it back to number
- `res.status(400)`: send the status
- `req.json()`: parses incoming requests with JSON payloads

## urlendcode Reference
- https://blog.tedshd.io/page/3/
-