Is this possible to uploade excel files by using gargron Fileupload in laravel?

i have checked the core file in which allowed meme types are

public function isImage() { return in_array( $this->mimeType, ['image/gif', 'image/jpeg', 'image/pjpeg', 'image/png'] ); }

i have modified the code like below

public function isImage() { return in_array( $this->mimeType, ['image/gif', 'image/jpeg', 'image/pjpeg', 'image/png', 'application/xlsx' , 'application/csv'] ); }

but its not work for me.please anyone suggest what can i do..

via Chebli Mohamed