/* 封装ajax函数 * @param {string}opt.type http连接的方式，包括POST和GET两种方式 * @param {string}opt.url 发送请求的url * @param {boolean}opt.async 是否为异步请求，true为异步的，false为同步的 * @param {object}opt.data 发送的参数，格式为对象类型 * @param {function}opt.success ajax发送并接收成功调用的回调函数 */function ajax(opt) { ???opt = opt || {}; ???opt.method = opt.method.toUpperCase() || ‘POST‘; ???opt.url = opt.url || ‘‘; ???opt.async = opt.async || true; ???opt.data = opt.data || null; ???opt.success = opt.success || function () {}; ???var xmlHttp = null; ???if (XMLHttpRequest) { ???????xmlHttp = new XMLHttpRequest(); ???} ???else { ???????xmlHttp = new ActiveXObject(‘Microsoft.XMLHTTP‘); ???} ???// xmlHttp.withCredentials = true; // 携带跨域cookie ???var params = []; ???for (var key in opt.data){ ???????params.push(key + ‘=‘ + opt.data[key]); ???} ???var postData = params.join(‘&‘); ???if (opt.method.toUpperCase() === ‘POST‘) { ???????xmlHttp.open(opt.method, opt.url, opt.async); ???????xmlHttp.setRequestHeader(‘Content-Type‘, ‘application/x-www-form-urlencoded;charset=utf-8‘); ???????xmlHttp.send(postData); ???} ???else if (opt.method.toUpperCase() === ‘GET‘) { ???????xmlHttp.open(opt.method, opt.url + ‘?‘ + postData, opt.async); ???????xmlHttp.send(null); ???} ????xmlHttp.onreadystatechange = function () { ???????if (xmlHttp.readyState == 4 && xmlHttp.status == 200) { ???????????opt.success(xmlHttp.responseText); ???????} ???};}ajax({ ???method: ‘GET‘, ???url: ‘http://cdn.aiclk.com/game/dice/dice.html?iclicashid=7664017&&gameTimes=8&&iclicashsid=&&redpack=1&&appShow=0&&back=0‘, ???data: {}, ???success: function (response) { ??????console.log(response); ???}});原生ajax封装及用法
原文地址：https://www.cnblogs.com/guolintao/p/9081148.html