How to create and write files in JavaScript from Chrome Extension?

Question

JavaScript

Hi all. I had a problem: I need to perform fairly simple actions - create and write files to the specified path, but it is also possible in chrome storage, from a script in chrome extension. The problem is that a couple of hours in Google did not give any result - there are some complicated options everywhere, like creating an additional Chrome app and messaging with it. Is there a less complicated way? I'm already very tired, although all I want is to save data for myself, it's not clear why this is so difficult.
Thanks in advance.

Answer 1

Everything is perfectly saved via chrome.downloads.download
As an example, save the full localStorage extension

var result = JSON.stringify(localStorage,"", 4),
  obj = {
    "filename": "localStorage.json",
    "url": 'data:application/json;charset=utf-8,' + encodeURIComponent(result),
    "conflictAction": "prompt",
    "saveAs": true
  };
chrome.downloads.download(obj);

This will definitely show the window "Save as ..."
Smoke here chrome.downloads

Answer 2

I'm already very tired, although all I want is to save data for myself, it's not clear why this is so difficult.

Store information in localstorage. It simply cannot be saved to a file.