Flutter WEB download option

Question

I am making flutter web app that should generate a file from user data. And have the option to download the output file.

But I can not find any options/packages whic

Answer 1

One way to trigger download is the adapt a common pattern used in "native" javascript, create an anchor element with the download attribute and trigger a click.

import 'dart:convert';
import 'dart:html';

main() {
  File file = // generated somewhere
  final rawData = file.readAsBytesSync();
  final content = base64Encode(rawData);
  final anchor = AnchorElement(
      href: "data:application/octet-stream;charset=utf-16le;base64,$content")
    ..setAttribute("download", "file.txt")
    ..click();
}