export default class AsyncRequest {
    sendRequest(method, url, param) {
        return new Promise(function (resolve, reject) {
            let xhr = new XMLHttpRequest()
            xhr.open(method, url)
            xhr.onload = function () {
                if (this.status >= 200 && this.status < 300) {
                    resolve(xhr.response)
                } else {
                    reject({
                        status: this.status,
                        statusText: xhr.statusText
                    })
                }
            };
            xhr.onerror = function () {
                reject({
                    status: this.status,
                    statusText: xhr.statusText
                })
            }
            console.log(param)
            if (param == null) {
                xhr.send()
            } else {
                xhr.send(param)
            }
        }
        )
    }
}