To set response status and JSON content in a REST API made with Node.js and Express, we call the res.status method with the HTTP status code that we want to return.
For instance, we can write:
const express = require('express')
const app = express()
const port = 3000
app.get('/', (req, res) => {
res.send('hello world');
});
app.get('/error', (req, res) => {
res.status(500).send({ error: "error" });
});
app.listen(port, () => {
console.log(`Example app listening at http://localhost:${port}`)
})
We add the /error route, which returns a 500 response by call res.status with 500.
Then we call send with an object to return that as the JSON response body.
