Node.js app.get res.send 与 return res.send 之间有什么区别吗

发布于03月28日

I am new to node and express. I have seen app.get and app.post examples using both "res.send" and "return res.send". Are these the same?

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

app.get('/', function(req, res) {
  res.type('text/plain');
  res.send('i am a beautiful butterfly');
});

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

app.get('/', function(req, res) {
  res.type('text/plain');
  return res.send('i am a beautiful butterfly');
});

推荐答案

The return keyword returns from your function, thus ending its execution. This means that any lines of code after it will not be executed.

In some circumstances, you may want to use res.send and then do other stuff.

app.get('/', function(req, res) {
  res.send('i am a beautiful butterfly');
  console.log("this gets executed");
});

app.get('/', function(req, res) {
  return res.send('i am a beautiful butterfly');
  console.log("this does NOT get executed");
});