jq.ajax和ajax的Promise封装

Posted 2021-09-09 纸 飞机

jq.ajaxd的Promise封装:

let ajax=function(url,type,data,datatype){
        return new Promise((resolve,reject)=>{
            $.ajax({
                type: type,
                url: url,
                data: data,
                dataType: datatype,
                success: function (res) {
                    resolve(res)
                },
                error:function(error){
                    reject(error)
                }
            });
        })
       }
      ajax('http://ajax.root181.com/get.php','get',{a:1,b:2},'text')
      .then(data=>{console.log(data)})
      .catch(error=>{
          throw error.status
      })

原生ajax 的Promise封装 :

 function ajax(url, data, method) {
            if (method == "get") {
                //拼接路径,解决缓存问题
                url += "?time=" + new Date().getTime();
                //判断传输的数据是否是一个对象
                if (typeof data == "object") {
                    for (var i in data) {
                        url += "&" + i + "=" + data[i]
                    }
                } else {
                    if (data) {
                        url += "&" + data
                    }
                }
            } else {
                //拼接路径,解决缓存问题
                var str = 'time=' + new Date().getTime();
                if (typeof data == 'object') {
                    for (var i in data) {
                        str += "&" + i + "=" + data[i];
                    }
                } else {
                    str += data
                }
            }
            //
            return new Promise((resolve, reject) => {
                var xhr = null;
                xhr = new XMLHttpRequest();
                if (method == "get") {
                    console.log(url);
                    xhr.open('get', url, true);
                    xhr.send();
                    xhr.onreadystatechange = function () {
                        if (xhr.readyState == 4 && xhr.status == 200) {
                            resolve(xhr.responseText);
                        }
                        setTimeout(function () {
                            reject(new Error('连接超时'))
                        }, 2000)
                    }
                }
                if (method == "post") {
                    xhr.open('post', url);
                    xhr.setRequestHeader("Content-type", "application/x-www-form-urlencoded; charset=utf-8");
                    xhr.send(str);
                    xhr.onreadystatechange = function () {
                        if (xhr.readyState == 4 && xhr.status == 200) {
                            resolve(xhr.responseText);
                        }
                        setTimeout(function () {
                            reject(new Error('连接超时'));
                        }, 2000)
                    }
                }
            })
        }
        ajax('http://ajax.root181.com/post.php', { a: 1, b: 2 }, 'post')
        .then(data => {
            console.log(data)
        })