nodejs,express链式反应

• 链式反应–next()

const myexpress = require('express');
const bodyparser = require('body-parser');
var server = myexpress();
server.listen();
server.use('/',function (req,res,next) {
    console.log('a');
    req.name = "陈培昌";
    next()
});server.use('/',function (req,res,next){
    console.log('b');
    req.intro = req.name+"芳龄"+;
    next();
});server.use('/',function (req,res,next) {
    console.log(req.intro)
});

上机结果：

a
b
陈培昌芳龄22