【前端】文件下载重命名

同域下

​​var​​​ ​​link = document.createElement(​​​​'a'​​​​);​​
​​link.href = file.url;​​
​​link.download = file.name;​​
​​link.target=​​​​"_blank"​​​​;​​
​​link.click();​​

跨域下

function load(file) { this.getBlob(file.url).then(blob => { this.saveAs(blob, file.name); }); }

getBlob(url) {
  return new Promise(resolve => {
   const xhr = new XMLHttpRequest();

   xhr.open('GET', url, true);
   xhr.responseType = 'blob';
   xhr.onload = () => {
    if (xhr.status === 200) {
     resolve(xhr.response);
   }
  };

  xhr.send();
  });
}

​​//下载文件​​
​​saveAs(blob, filename) {​​
​​  var​​​ ​​link = document.createElement(​​​​'a'​​​​);​​
​​  link.href = window.URL.createObjectURL(blob);​​
​​  link.download = filename;​​
​​  link.click();​​
​​}​​