Could I chain several downloads with chrome.downloads.download method?

[Victor Leo]

Hi, given the following backgrounds in MV3+:

• In user's browser, "Ask where to save each file before downloading" is switched on.
• There are 3 files which are supposed to be downloaded continueously: a.txt, b.json, c.md.
• If possible, try not to use zip; it can be the final fallback though.

I'm stuck at this point and couldn't gurantee 3 file-choosers would always be shown; What I'm thinking about is: would it be possible to invoke 3 file-choosers and let the user confirm them one by one? I've done the following 2 attempts:

In an async function, given the input like:

const fileConfs = [

{ filename: "a.txt", url: "data:text/plain;base64,dGVzdCB0ZXh0" },

{ filename: "b.json", url: "data:application/json;base64,eyJ0ZXN0IjoidmFsdWUifQ==" },

{ filename: "c.md", url: "data:text/markdown;base64,I3Rlc3Q=" }

];

Attempt 1, not work, only 1st file a.txt is prompted with file-chooser:

for (let fileConf of fileConfs) {

const downloadId = await chrome.downloads.download({

saveAs: false,

...fileConf

});

console.log(downloadId);

}

Attempt 2, not work either:

const downloadIds = await Promise.all(

fileConfs.map(fileConf =>

chrome.downloads.download({

saveAs: false,

...fileConf

})

)

);

downloadIds.forEach(id => console.log(id));

Many times, I only got 1 file-chooser for the first file, but the other 2 vanished. Seems the user interaction will not block the execution of micro tasks? Not quite sure.

Thanks a lot for your time and ideas.

Best Regards

Magartroid

10th Feb 2022