mvc 后台调用js方法

function fetchData() {
    fetch('/api/data')
        .then(response => response.json())
        .then(data => {
            // 处理返回的数据
            console.log(data);
            updateView(data); // 假设有一个updateView方法用于更新视图
        })
        .catch(error => console.error('Error:', error));
}

function updateView(data) {
    // 更新视图的逻辑
    document.getElementById('result').innerText = JSON.stringify(data);
}

const express = require('express');
const app = express();

app.get('/api/data', (req, res) => {
    const data = { message: 'Hello from server!' };
    res.json(data);
});

app.listen(3000, () => {
    console.log('Server is running on port 3000');
});

const socket = new WebSocket('ws://example.com/socket');

socket.onmessage = function(event) {
    const data = JSON.parse(event.data);
    updateView(data); // 假设有一个updateView方法用于更新视图
};

function updateView(data) {
    // 更新视图的逻辑
    document.getElementById('result').innerText = JSON.stringify(data);
}

const WebSocket = require('ws');
const wss = new WebSocket.Server({ port: 8080 });

wss.on('connection', function connection(ws) {
    ws.on('message', function incoming(message) {
        console.log('received: %s', message);
    });

    ws.send(JSON.stringify({ message: 'Hello from server!' }));
});