1、客户端代码<!doctype html><html><head><meta charset=“utf-8”><title>Server-Sent</title></head><body><div id=“result”></div><!–js–><script>var source = new EventSource(’/source.interface’); //数据接口source.onmessage = function(event){ document.getElementById(‘result’).innerHTML += event.data + ‘<br>’; }</script></body></html>2、Nodejs后台代码var express = require(’express’);var router = express.Router();router.get(‘source.interface’, function(req, res, next){ res.setHeader(‘Content-Type’, ’text/event-stream’); res.setHeader(‘Cache-Control’, ’no-cache’); res.send(‘data:’ + new Date() + ‘\n\n’); //后面必须带有’\n\n’，否则不会触发 });