@probe-web/artifacts

Firmware images as inputs. Pick a file once with the File System Access API, remember its handle in IndexedDB so it survives reloads, and watch it so a rebuild re-flashes without another file dialog. Drag-dropped files (fromFile) and URLs (fromUrl) share the same ArtifactSource shape, and downloadBytes() hands a file (a coredump, a memory dump) back to the user.

npm install @probe-web/artifacts

import { pickFile, rememberHandle } from '@probe-web/artifacts';

button.onclick = async () => {
  const artifact = await pickFile({ extensions: ['.elf'] }); // must run in a user gesture
  await rememberHandle('app', artifact.handle); // recallHandle('app') after a reload
  await flash(await artifact.bytes());
  // Polls the file; fires after each rebuild, once the file has stopped changing.
  const stop = artifact.watch((change) => void flash(change.bytes));
};

• The picker and handle persistence need the File System Access API (Chromium-based desktop browsers); check hasFileSystemAccess() first. fromFile, fromUrl and downloadBytes work anywhere.
• pickFile() and permission requests need a user gesture. After a reload, a recalled handle may need read permission again: restoreHandles() checks without prompting on load, and asks with request: true from a click.
• Watching polls (default every 500 ms); the API has no change events.

API reference: https://beriberikix.github.io/probe-web/api/artifacts/