How to send JSON data back to client in vanilla Nodejs

Question

I need to send json data to the client in Nodejs NOT using Express or any other frameworks. How is it possible to achieve ?

const server = http.createServer(function(request, response){
    switch (request.url){
        case '/':
            mainPage(request, response);
            break;
        default:
            response.writeHead(404);
            response.end('Page not found');
    }
})

function mainPage(request, response){
    const clientData = {"status": "ok"}

    .... // send back to client, how ?
 }

Does this answer your question? Responding with a JSON object in Node.js (converting object/array to JSON string) — luk2302
– luk2302, Commented Dec 11, 2022 at 6:12
Just set the Content-Type header to application/json, then send the stringified json JSON.stringify(data) — skara9
– skara9, Commented Dec 11, 2022 at 6:14

Amir MB · Accepted Answer · 2022-12-11 06:40:24Z

2

You can write on the response object:

function mainPage(request, response) {
    const data = {"status": "ok"};
    response.writeHead(200, {"Content-Type": "application/json"});
    response.end(JSON.stringify(data));
}

answered Dec 11, 2022 at 6:40

Amir MB

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