Simple Notes API Project with Express

Simple Notes API Project with Express — a practical guide to Express notes API project with clear examples you can reuse in real projects.

Simple Notes API Project with Express — 41/55 in the Node.js series. Full playlist companion: Node.js complete course on YouTube. Prefer one article? Read the complete Node.js tutorial.

Short description

A Notes API ties together routing, middleware, validation, and status codes — a strong portfolio mini-project before databases.

Validation middleware

function requireText(req, res, next) {
  if (!req.body?.text?.trim()) {
    return res.status(400).json({ error: 'text is required' });
  }
  next();
}

app.post('/api/notes', requireText, (req, res) => {
  /* create note */
});