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(8080);
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"+22;next();
});server.use('/',function (req,res,next) {console.log(req.intro)
});

上机结果：

a
b
陈培昌芳龄22