javascript 化妆的XHR请求和返回promise.js

Posted 2021-05-04

function makeXHRRequest(method, url, token, data) {
    return new Promise(function (resolve, reject) {
        var xhr = new XMLHttpRequest();
        xhr.upload.addEventListener("progress", function(evt){
            if (evt.lengthComputable) {
              onProgress(evt)
            }
          }, false);
          
        xhr.open(method, url, true);
        xhr.setRequestHeader("Authorization", token);
        xhr.onload = function(){
            return resolve(xhr);
        };
        xhr.onerror = reject;
        xhr.send(data);
    });
}