原生js 封装好了的ajax 带钩子版本 可封装成对象

<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
	</head>
	<body>
	</body>
	<script type="text/javascript">
		//ajax_all_Filed
		// https://blog.csdn.net/qq_33285292/article/details/76147450
		
		// 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) {
		
		try{
			
			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 () {};
			opt.error = opt.error || function () {};
			
			var xmlHttp = null;
			if (XMLHttpRequest) {
				xmlHttp = new XMLHttpRequest();
			}
			else {
				xmlHttp = new ActiveXObject('Microsoft.XMLHTTP');
			}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.setRequestHeader('Accept', 'application/json, text/javascript, */*');
				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) {
					var res = JSON.parse(xmlHttp.responseText);
					if(res.code !=200){
						//全局处理异常
					}
					opt.success(res);
				}else if(xmlHttp.readyState == 4 && xmlHttp.status == 0){
					opt.error("Your url is error");//错误
				}else if(xmlHttp.readyState == 4 && xmlHttp.status != 200){
					opt.error(xmlHttp.responseText);//错误
				}
				
				//console.log(xmlHttp.readyState,xmlHttp.status);
				//console.log(xmlHttp.readyState,xmlHttp.status);
			};
		
		}catch(e){
			opt.error(e);//错误
		}
	}

	// 使用
	// error:function(ev) {
	ajax({
		method: 'get',
		url: 'http://106.15.196.194:3333/Getlist',
		async:true,
		data: {
			name1: 'value1',
			name2: 'value2'
		},
		success: function (response) {
		   //console.log(response);
		   

		},
		error:function(e){
			console.log(e);
		}
	});
		
		
	</script>
</html>

  

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转载自www.cnblogs.com/shaozhu520/p/10917863.html