NotAllowedError: Failed to execute 'createWritable' on 'FileSystemFileHandle'

[CedricBonjour]

async save() {
if (this.viewOnly) return;
if (this.handle === null) this.saveAs();
else {
const writableStream = await this.handle.createWritable();
try {
let csvContent = CsvHandle.from2D(sheet.df.data)
await writableStream.write(csvContent);
await writableStream.close();
sheet.df.isSaved = true;
sheet.refresh();
} catch (err) {
Msg.confirm(err);
}
}
}

nc_script.js:226 Uncaught (in promise) NotAllowedError: Failed to execute 'createWritable' on 'FileSystemFileHandle': The request is not allowed by the user agent or the platform in the current context.

ask the user to enable setting if occures

[CedricBonjour]

do something like

async function verifyPermission(fileHandle, readWrite = false) {
  const opts = readWrite ? { mode: 'readwrite' } : {};
  // If we already have permission, we're good.
  if ((await fileHandle.queryPermission(opts)) === 'granted') {
    return true;
  }
  // Request permission (must be in user gesture!).
  if ((await fileHandle.requestPermission(opts)) === 'granted') {
    return true;
  }
  return false; // user denied
}

async save() {
  if (this.viewOnly) return;

  // If we don't yet have a handle, run Save As to get one (user picks location).
  if (!this.handle) {
    await this.saveAs();   // ensure saveAs() sets this.handle when successful
    return;
  }

  // Ensure we have read-write permission.
  const canWrite = await verifyPermission(this.handle, true);
  if (!canWrite) {
    Msg.confirm('Write permission not granted. Please use "Save As" or grant access.');
    return;
  }

  try {
    // Create a writable stream to the file.
    const writableStream = await this.handle.createWritable({ keepExistingData: true });
    const csvContent = CsvHandle.from2D(sheet.df.data);
    await writableStream.write(csvContent);
    await writableStream.close();

    sheet.df.isSaved = true;
    sheet.refresh();
  } catch (err) {
    // Helpful diagnostics
    console.error('Save failed:', err.name, err.message, err);
    Msg.confirm(err);
  }
}