GET请求
<script>const btn = document.getElementById('kssb'); //绑定按钮btn.onclick = function() {const xhr = new XMLHttpRequest();xhr.open('GET', 'url');//open()参数：请求类型 URLxhr.send();xhr.onreadystatechange = function() {//当请求完毕时if (xhr.readyState == 4) {//判断请求是否成功if (xhr.status == 200 && xhr.status < 300) {//请求成功事件alert(xhr.response);}}}}</script>
POST请求
<script>const btn = document.getElementById('kssb'); //绑定按钮btn.onclick = function() {const xhr = new XMLHttpRequest();xhr.open('POST', 'url');xhr.send(a=1&b=3&c=5);//POST请求数据xhr.onreadystatechange = function() {//当请求完毕时if (xhr.readyState == 4) {//判断请求是否成功if (xhr.status == 200 && xhr.status < 300) {//请求成功事件alert(xhr.response);}}}}</script>
