原生JS封装ajax

 1 /* 封装ajax函数 2 ?* @param {string}opt.type http连接的方式，包括POST和GET两种方式 3 ?* @param {string}opt.url 发送请求的url 4 ?* @param {boolean}opt.async 是否为异步请求，true为异步的，false为同步的 5 ?* @param {object}opt.data 发送的参数，格式为对象类型 6 ?* @param {function}opt.success ajax发送并接收成功调用的回调函数 7 ?*/ 8 ????function ajax(opt) { 9 ????????opt = opt || {};10 ????????opt.method = opt.method.toUpperCase() || ‘POST‘;11 ????????opt.url = opt.url || ‘‘;12 ????????opt.async = opt.async || true;13 ????????opt.data = opt.data || null;14 ????????opt.success = opt.success || function () {};15 ????????var xmlHttp = null;16 ????????if (XMLHttpRequest) {17 ????????????xmlHttp = new XMLHttpRequest();18 ????????}19 ????????else {20 ????????????xmlHttp = new ActiveXObject(‘Microsoft.XMLHTTP‘);21 ????????}var params = [];22 ????????for (var key in opt.data){23 ????????????params.push(key + ‘=‘ + opt.data[key]);24 ????????}25 ????????var postData = params.join(‘&‘);26 ????????if (opt.method.toUpperCase() === ‘POST‘) {27 ????????????xmlHttp.open(opt.method, opt.url, opt.async);28 ????????????xmlHttp.setRequestHeader(‘Content-Type‘, ‘application/x-www-form-urlencoded;charset=utf-8‘);29 ????????????xmlHttp.send(postData);30 ????????}31 ????????else if (opt.method.toUpperCase() === ‘GET‘) {32 ????????????xmlHttp.open(opt.method, opt.url + ‘?‘ + postData, opt.async);33 ????????????xmlHttp.send(null);34 ????????} 35 ????????xmlHttp.onreadystatechange = function () {36 ????????????if (xmlHttp.readyState == 4 && xmlHttp.status == 200) {37 ????????????????opt.success(xmlHttp.responseText);38 ????????????}39 ????????};40 ????}

 1 ajax({ 2 ????method: ‘POST‘, 3 ????url: ‘test.php‘, 4 ????data: { 5 ????????name1: ‘value1‘, 6 ????????name2: ‘value2‘ 7 ????}, 8 ????success: function (response) { 9 ???????console.log(response)；10 ????}11 });

原生JS封装ajax

原文地址：https://www.cnblogs.com/Mr5GG/p/9071488.html