class Ajax {
    //url接口
    http =  new XMLHttpRequest();

    constructor() {
    }

    get(option) {
        var params = ""//留空进行处理
        for (const key in option.data) {
            console.log(key);
            console.log(option.data[key]);
            params += `&${key}=${option.data[key]}`//拼接字符串
        }
        params = params.replace("&", "?");//替换字符串
        option.url = option.url + params;//拼接字符串
        this.http.open("GET", option.url);//发送请求
        this.http.send()//发送请求
        this.onreadystatechange(option);//传方法
        console.log(option.url)
    }

    post(option) {
        this.http.open("POST", option.url);
        this.http.setRequestHeader('Content-Type', 'application/josn');
        this.http.send(JSON.stringify(option.data))
        this.onreadystatechange(option)
    }
    onreadystatechange(callback){
        this.http.onreadystatechange = () =>{

            if (this.http.readyState == 4) {
                if (this.http.status == 200) {
                   callback.success(JSON.parse(this.http.response))
                }  else {
                    callback.error(this.http)
                }
            }
        }
    }
}

var ajax = new Ajax()