只需要调用abort方法
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<!-- <meta http-equiv="X-UA-Compatible" content="IE=edge"> -->
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>取消请求</title>
</head>
<body>
<button>点击发送</button>
<button>点击取消</button>
<script>
//获取元素
const btns = document.querySelectorAll('button');
let x = null;
btns[0].onclick = function(){
x = new XMLHttpRequest();
x.open("GET",'http://127.0.0.1:8000/delay');
x.send();
}
btns[1].onclick = function(){
x.abort();
// alert(23432);
}
</script>
</body>
</html>
注意:
最初const x 为常量,无法修改。此处将let x写在最外层,两个方法都可对其进行修改。