BitWithBite
Full-Stack · Quick Reference
Lesson 25 — Express REST API Cheat Sheet
In one line: Express maps HTTP method + path to handler functions, with middleware running in between — CRUD maps to GET/POST/PUT/DELETE.
CRUD → HTTP
Create
POST → 201
Read
GET → 200
Update
PUT/PATCH → 200
Delete
DELETE → 204
Not found
404
Route Example
app.use(express.json());
app.get('/api/courses', (req,res) => res.json(courses));
app.post('/api/courses', (req,res) => {
const c = {id: courses.length+1, ...req.body};
courses.push(c);
res.status(201).json(c);
});