Puppeteer: how to access/intercept a FileSystemDirectoryHandle? - puppeteer

Question

I'm wondering if it's possible within puppeteer to access a FileSystemDirectoryHandle (from the File System Access API). I would like to pass in a directory path via puppeteer as though the user had selected a directory via window.showDirectoryPicker(). On my client page I use the File System Access API to write a series of png files taken from a canvas element, like:
const directoryHandle = await window.showDirectoryPicker();
for (let frame = 0; frame < totalFrames; frame++){
const fileHandle = await directoryHandle.getFileHandle(`${frame}.png`, { create: true });
const writable = await fileHandle.createWritable();
updateCanvas(); // <--- update the contents of my canvas element
const blob = await new Promise((resolve) => canvas.toBlob(resolve, 'image/png'));
await writable.write(blob);
await writable.close();
}
On the puppeteer side, I want to mimic that behavior with something like:
const page = await browser.newPage();
await page.goto("localhost:3333/canvasRenderer.html");
// --- this part doesn't seem to exist ---
const [dirChooser] = await Promise.all([
page.waitForDirectoryChooser(),
page.click('#choose-directory'),
]);
await dirChooser.accept(['save/frames/here']);
//--------------------------------------
but waitForDirectoryChooser() doesn't exist.
I'd really appreciate any ideas or insights on how I might accomplish this!