How to send Json response in express js

Usually, API calls or request are handled by sending a response using res.send(…). You can equally send a json response using the in-built res.json() method.
This method accepts an object and converts it to json during response.

read also: morgan http request logger

Code example:

Below is a simple express app with one route running on port 3000.
The home route sends a json response.

const express = require('express');
const app = express();

const data = { name: 'john', age: 23, city: 'Douala', email: 'test@test.com' }

app.get('/', (req, res) => {
    res.json(data)  // Object can also be passed in the brackets directly 
})

app.listen(3000, () => {
    console.log('code running on port 3000');
})

Output:

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Links: Express Website, JSON