getFileExtension method

String getFileExtension(
  1. String filePath
)

Get file extension safely

Implementation

String getFileExtension(String filePath) {
  final lastDot = filePath.lastIndexOf('.');
  if (lastDot == -1 || lastDot == filePath.length - 1) {
    return '';
  }
  return filePath.substring(lastDot).toLowerCase();
}