利用Promise封装jquery ajax

;(function ($) {

    let request = function(url,method,params,body){
        return new Promise((resolve, reject) =>{
            let aj = {
                url: url,
                method:method,
                dataType:'json',
                success(returnData) {
                    resolve(returnData);
                },
                error(error){
                    reject(error);
                }
            };
            if (body == true){
                aj.contentType = 'application/json'
                aj.data=JSON.stringify(params);
            }else {
                aj.data = params;
            }
            $.ajax(aj);
        });
    }

    window.$ajax = {
        get(url,params,body=false){
            return request(url,'GET',params,body);
        },
        post(url,params,body=true){
            return request(url,'POST',params,body);
        },
        put(url,params,body=true){
            return request(url,'PUT',params,body);
        },
        delete(url,params,body=true){
            return request(url,'DELETE',params,body);
        }
    }
})(jQuery);