To return JSON responses with Express, we can use the res.json method to return a JSON response.
For instance, we can write:
const express = require('express')
const app = express()
const port = 3000
app.set('json spaces', 2);
app.get('/', (req, res) => {
const obj = { foo: 1, bar: 2, baz: 3 }
res.json(obj)
})
app.listen(port, () => {
console.log(`Example app listening at http://localhost:${port}`)
})
We call app.set to set the 'json spaces' setting to 2 to make the indentation of the JSON 2 spaces.
Then in the GET / route, we call res.json with an object to return the obj object as the response.
Therefore, the response we get is:
{
"foo": 1,
"bar": 2,
"baz": 3
}
when we go to the GET / route.
