bootcdn.cn 搜索 JQuery
复制标签链接到代码中
<script src="https://cdn.bootcdn.net/ajax/libs/jquery/3.6.0/jquery.min.js"></script>
案例
页面三个按钮:GET 、 POST 、 通用型方法AJAX 点击按钮分别实现其功能
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>jQuery 发送 AJAX 请求</title> <link crossorigin="anonymous" href="https://cdn.bootcss.com/twitter-bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet"> <script crossorigin="anonymous" src="https://cdn.bootcdn.net/ajax/libs/jquery/3.5.1/jquery.min.js"></script> </head> <body> <div class="container"> <h2 class="page-header">jQuery发送AJAX请求 </h2> <button class="btn btn-primary">GET</button> <button class="btn btn-danger">POST</button> <button class="btn btn-info">通用型方法ajax</button> </div> <script> $('button').eq(0).click(function(){ $.get('http://127.0.0.1:8000/jquery-server', {a:100, b:200}, function(data){ console.log(data); },'json'); }); $('button').eq(1).click(function(){ $.post('http://127.0.0.1:8000/jquery-server', {a:100, b:200}, function(data){ console.log(data); }); }); $('button').eq(2).click(function(){ $.ajax({ //url url: 'http://127.0.0.1:8000/jquery-server', //参数 data: {a:100, b:200}, //请求类型 type: 'GET', //响应体结果 dataType: 'json', //成功的回调 success: function(data){ console.log(data); }, //超时时间 timeout: 2000, //失败的回调 error: function(){ console.log('出错啦!!'); }, //头信息 headers: { c:300, d:400 } }); }); </script> </body> </html>
server.js
//jQuery 服务 app.all('/jquery-server', (request, response) => { //设置响应头 设置允许跨域 response.setHeader('Access-Control-Allow-Origin', '*'); response.setHeader('Access-Control-Allow-Headers', '*'); // response.send('Hello jQuery AJAX'); const data = {name:'尚硅谷'}; response.send(JSON.stringify(data)); });