Front and rear ends separated ---- VUE + node (express)

vue frame as the front end, node (express) as the rear end of the frame. No database, save the data using the port.

VIEW:

Use vue vue-cli building project (vueapp).

vue project

npm install -g vue-cli（安装，安装过的就不用了）
vue init webpack vueapp

axios :( ajax and similar)

import axios from 'axios'
var url="http://localhost:3000"                       //express服务器的地址
axios.get(url+'/product')                             //放数据的接口
  .then(function (response) {                         //收到的数据
    console.log(response);
    console.log(response.data);                       //展示数据（看看是否拿到，和数据长啥样） 
    var nodeData=response.data;           
  })
  .catch(function (error) {
    console.log(error);![在这里插入图片描述](https://img-blog.csdnimg.cn/20191013132943460.jpg)
  });

axios did not install the equipment remember it. (Installation not elaborate)

node (express): Start >>> npm start

Use express build server:
express project

新建个myapp放express
npm install express

In (routes folder) to build a product, js Interface

var express = require('express');           //使用express
var router = express.Router();               //放数据
/* GET home page. */
router.get('/', function (req, res, next) {
    var data = {
        code: 0,
        data: {
            name: 'aaa',
            pwd: '123'
        },
        isSuccess: true,
        msg: "请求成功"
    }
    res.json(data);
});
module.exports = router;

app.js (interfacing to store data)

var productRouter = require('./routes/product');
app.use('/product', productRouter);

Finally, the server data have! ! ! ! Receiving data link front end has also been VUE! ! ! But still no way to link! ! ! !

This is the problem of cross-domain! ! !

Cross-domain:

1. Port different http: // localhost: 3000 and http: // localhost: 8080

2. Website www.baidu.com different and www.aiqiyi.com

3.ip and different URL http: // localhost: 3000 and http://127.0.0.1

Anyway, unless the same URLs inside, only a different directory, you do not need cross-domain.

Begin to solve! !

express>>>app.js

//跨域问题解决方面
const cors = require('cors');  
app.use(cors({  
    origin:['http://localhost:8080'],
    methods:['GET','POST'],
}));
//跨域问题解决方面
app.all('*',function (req, res, next) {
  res.header('Access-Control-Allow-Origin', 'http://localhost:8080');
  res.header('Access-Control-Allow-Headers', 'Content-Type');
  res.header('Access-Control-Allow-Methods', 'PUT, POST, GET, DELETE, OPTIONS');
　next();　
});

cors need to install a dependency.

Results:
Server (express): 3000 interface data
Here Insert Picture Description
Access to information data
to get