ajax.js
// 引用expess框架
const express = require('express');
// 处理路径
const path = require('path');const bodyParser = require('body-parser');
const fs = require('fs');// 创建网站服务器
const app = express();
app.use(bodyParser.json());
app.get('/first', (req, res) => {res.send('hello geyao')
})
app.get('/responsdate', (req, res) => {res.send({ "name": "geyao" })
})
app.post('/post', (req, res) => {res.send(req.body);
})
app.get('/get', (req, res) => {res.send(req.query);
})
app.post('/json', (req, res) => {res.send(req.body);
})
app.get('/readystate', (req, res) => {res.send('hello');
})
app.get('/error', (req, res) => {res.status(400).send('not ok');
})
app.get('/geyao', (req, res) => {res.send('hello geyao')
})
app.get('/cache', (req, res) => {fs.readFile('./text.txt', (err, result) => {res.send(result);});
})
app.use(express.static(path.join(__dirname)));
// 监听端口
app.listen(3000);
console.log('网站服务器启动成功, 请访问localhost')ajax10.html
<!DOCTYPE html>
<html lang="en"><head><meta charset="UTF-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><title>Document</title>
</head><body><script>function ajax(options) {//创建ajax对象var xhr = new XMLHttpRequest();//配置ajax对象xhr.open(options.type, options.url);//发送请求xhr.send();//触发xhr.onload = function() {console.log(xhr.responseText);options.success();}}ajax({type: 'get',url: 'http://localhost:3000/responsdate',success: function(data) {console.log(data);}})</script>
</body></html>ajax1.html
<!DOCTYPE html>
<html lang="en"><head><meta charset="UTF-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><title>Document</title>
</head><body><script>//1创建ajax对象var xhr = new XMLHttpRequest();//请求方式xhr.open('get', 'http://localhost:3000/responsdate');//发送请求xhr.send();//获取数据xhr.onload = function() {/* console.log(xhr.responseText); */var res = JSON.parse(xhr.responseText);console.log(res);var str = '<h2></h2>'document.body.innerHTML = str;}</script>
</body></html>运行结果
