vue express将GET替换为POST

我用express和mysql创建了一个Vue应用程序。问题是我需要使用POST而不是GET（当前正在工作）

快递：

const express = require('express');
const cors = require('cors');
const bodyParser = require('body-parser');
const morgan = require('morgan');
const app = express();
 
app.use(morgan('tiny'));
app.use(cors());
app.use(bodyParser.json());

var data = result; //receive result from database
app.get('/data', (req, res) => { //send data to client
  res.writeHead(200, {'Content-Type':'application/json'});
  res.write(JSON.stringify(data));
  return res.end();
});

const port = process.env.PORT || 3000;
app.listen(port, () => {
    console.log(`listening on ${port}`);
}); 

Vue组件：

const API_URL = "http://localhost:3000/data"

export default {
  data() {
    return{
      myJson: []
    }
  },
  beforeCreate() { //receive data from the server
    fetch(API_URL)
    .then(response => response.json())
    .then(result => {
      this.myJson = result //save data in the variable
    })
  }
}

main.js

import Vue from 'vue'
import App from './App.vue'
import './registerServiceWorker'
import router from './router'
import store from './store'

Vue.config.productionTip = false

new Vue({
  router,
  store,
  render: h => h(App)
}).$mount('#app')

---

我需要使用POST，因为即使在刷新之后，页面也不会更新myJson变量。我到处搜索，没有找到办法。

我解决了axios的问题

快车

app.post('/data', (req, res) => { //here I just change get to post
  res.writeHead(200, {'Content-Type':'application/json'});
  res.write(JSON.stringify(data));
  return res.end();
});

Vue组件

import axios from 'axios' //I import axios after doing npm install

axios.post(API_URL) //I just change fetch to axios.post
.then(result => {
  this.myJson = result.data //Here I add .data
})  

编辑：因此我发现问题在于我在请求之外进行查询：

var data = result; // <-----  **WRONG**
app.post('/data', (req, res) => { //send data to client
  var data = result; // <----- **RIGHT**
  res.writeHead(200, {'Content-Type':'application/json'});
  res.write(JSON.stringify(data));
  return res.end();
});

var数据=结果；//{//向客户端发送数据
var数据=结果//