Node.js · Theory

response.writeHead() Method

Theory

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response.writeHead() Method

response.writeHead() Method is a Node.js topic. In plain words you use it for a short response.writeHead Method example in a script or API on localhost. Don’t start with a slogan — start with that picture.

Smallest example: the smallest response.writeHead Method example you can type. Type it, run it, and say what you see. If you can do that from memory, you know response.writeHead() Method.

From the example next to this theory: response.writeHead() Method — http.createServer handles each request with (req, res). Express sits on top of this..

Trap — only saying “response.writeHead Method” with no example. Fix that before you talk about advanced Node.js.

Viva: what is response.writeHead() Method? Then show the smallest response.writeHead Method example you can type. Then name the trap.

Exam tip

What is response.writeHead() Method? Show this: the smallest response.writeHead Method example you can type. Trap: only saying “response.writeHead Method” with no example.

Example

const http = require("http");

const server = http.createServer((req, res) => {
  res.writeHead(200, { "Content-Type": "application/json" });
  res.end(JSON.stringify({ ok: true, path: req.url }));
});

// server.listen(3000);
console.log("handler ready for", "/api/health");
console.log(JSON.stringify({ ok: true, path: "/api/health" }));

response.writeHead() Method — http.createServer handles each request with (req, res). Express sits on top of this.

Short notes

Defresponse.writeHead() Method — a short response.writeHead Method example in a script or API on localhost.
Rulethe smallest response.writeHead Method example you can type
Traponly saying “response.writeHead Method” with no example
Usea script or API on localhost

const http = require("http"); const server = http.createServer((req, res) => { res.writeHead(200, { "Content-Type": "application/json" }); res.end(JSON.stringify({ ok: true, path: req.url })); }); // server.listen(3000); console.log("handler ready for", "/api/health"); console.log(JSON.stringify({ ok: true, path: "/api/health" }));

response.writeHead() Method

Example

Short notes

Questions

response.writeHead() Method

Example

Short notes

Questions