下载文件代码
download(url, name) {
const x = new XMLHttpRequest();
x.open('get', url, true);
x.responseType = 'blob';
x.onload = () => {
const url = window.URL.createObjectURL(x.response);
const a = document.createElement('a');
a.href = url;
a.download = name;
a.dispatchEvent(new MouseEvent('click'));
};
x.send();
}