QFQ

Alternative Lösung:

FilePond.registerPlugin({
  // This function will be called for each file added to the pond
  fileValidateTypeDetectType: (source, type) => new Promise((resolve, reject) => {
    // Use a regular expression or similar to extract the extension from the file name
    const extension = source.name.split('.').pop().toLowerCase();

    // Define the allowed extensions
    const allowedExtensions = ['jpg', 'png', 'txt'];

    // Check if the extension is in the allowed list
    if (allowedExtensions.includes(extension)) {
      // Resolve the type if the extension is allowed (you can just return the extension)
      resolve(extension);
    } else {
      // Reject the file
      reject('Invalid file type');
    }
  })
});

allowedExtensions müssen selbst gepflegt.