「解構賦值 (Object Destructuring Assignment)」。
Destructuring 可以將陣列或物件中指定的資料取出成為變數。
很多宣告相同的時候, 可以放在同一個物件共同宣告
讓編碼看起來更簡潔.
我們就一次可以宣告多個變數// const name = req.body.name
// const email = req.body.email
// const password = req.body.password
// const password2 = req.body.password2
可以將所以綜合一起宣告(declared).
// const { name ,emal,password,password2 } = req.body
且它們的值都是從 req.body 取得
補充：
< req.body >:
簡單說是 XXX. josn讓model 可以互相讀取資料庫內容
Contains key-value pairs of data submitted in the request body. By default, it is undefined, and is populated when you use body-parsing middleware such as body-parser and multer.
This example shows how to use body-parsing middleware to populate req.body.
var app = require('express')();
var bodyParser = require('body-parser'); <== 安裝
var multer = require('multer'); app.use(bodyParser.json()); // for parsing application/json
app.use(bodyParser.urlencoded({ extended: true })); // for parsing application/x-www-form-urlencoded
app.use(multer()); // for parsing multipart/form-dataapp.post('/', function (req, res) {
console.log(req.body);
res.json(req.body);
})
req.body 是Post 的request功能 .
所以要安裝：body-parser
npm install body-parser npm 安裝吧！！
