express.js, why res.write not in api reference

Question

express.js, why res.write not in api reference

Form my another question can't do multiple res.send in express.js

Can't find "res.write" in http://expressjs.com/4x/api.html

here is code example:

response.write("foo");
response.write("bar");
//...
response.end()

node.js
express

Answer 1

This is because res.write isn't part of express API. This is a server without express:

var http = require('http');
http.createServer(function (req, res) {
  res.writeHead(200, {'Content-Type': 'text/plain'});
  res.write('Hi,');
  res.end('Hello World\n');
}).listen(1337, '127.O.O.1');

So you see the http module already has already that req and res arguments, and express make do with adding properties to these objects.