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使用a标签实现文件下载
<a href="http://somehost/somefile.zip" download="filename.zip">Download file</a>- href: 下载地址
- download: 文件名
使用 fetch(ajax) 实现文件下载
其实就是用fetch去模拟a标签的下载过程。
fetch('http://somehost/somefile.zip').then(res => res.blob()).then(blob => {
var a = document.createElement('a');
var url = window.URL.createObjectURL(blob);
var filename = 'myfile.zip';
a.href = url;
a.download = filename;
a.click();
window.URL.revokeObjectURL(url);
}))- 使用 createObjectURL 方法转化成 ObjectURL,等同于一个下载地址链接
- 通过 revokeObjectURL 回收 ObjectURL
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