1.express

// 导入expressconst express = require('express')// 创建应用对象const app = express()//设置跨域访问app.all('*', function(req, res, next) {     res.header("Access-Control-Allow-Origin", "*");  res.header("Access-Control-Allow-Headers", "X-Requested-With");  res.header("Access-Control-Allow-Methods","PUT,POST,GET,DELETE,OPTIONS");  res.header("X-Powered-By",' 3.2.1')  res.header("Content-Type", "application/json;charset=utf-8");  next();});// 创建路由规则app.post('/serve',(require,response) => {     // 发送数据  const data = {       success: 'success'  }  response.send(JSON.stringify(data))})// 监听端口启动服务app.listen(8888,() => {     console.log('服务启动成功了！！！');  })

2. ajax

    
       
       Document
       
               
           
    ajax发送请求

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