multi-download
Download multiple files at once in the browser
It works by abusing the a-tag download attribute.
Demo
Install
$ npm install multi-download
Note: This package targets the latest versions of Chrome, Firefox, and Safari.
Usage
<button id="download-button" data-files="unicorn.jpg rainbow.jpg">Download</button>
document.querySelector('#download-button').addEventListener('click', event => {
const files = event.target.dataset.files.split(' ');
multiDownload(files);
});
// With jQuery
$('#download-button').on('click', () => {
const files = $(this).data('files').split(' ');
multiDownload(files);
});
// With Blob
const unicorn = URL.createObjectURL(new Blob(['?'], {type: 'text/plain'}));
const goat = URL.createObjectURL(new Blob(['?'], {type: 'text/plain'}));
multiDownload([unicorn, goat]);
API
multiDownload(urls, options?)
Returns a Promise that resolves when all the downloads have started.
Note that there's a delay of 1 second between each download.
urls
Type: string[]
URLs to files you want to download. Can be absolute or relative, even cross-origin.
options
Type: object
rename
Type: Function
A function tht accepts an object containing url, index, and urls properties and is expected to return the new filename.
<button id="download-button" data-files="unicorn.jpg rainbow.jpg">Download</button>
document.querySelector('#download-button').addEventListener('click', event => {
const files = event.target.dataset.files.split(' ');
multiDownload(files, {
rename: ({url, index, urls}) => 'New name.pdf'
});
});
Caveats
If the user has enabled "Ask where to save each file before downloading" in Chrome, it will only download the first file.