FileReader returns an empty string when the file size is to large

[mariuszste]

I know this is pretty unrealistic, but I have a 600+MiB file and I get Uncaught SyntaxError: Unexpected end of JSON input because FileReader returns an empty string when the file is to big. I think one possible solution would be to read the file in chunks using File.slice.

additional links:
https://stackoverflow.com/questions/20706418/are-there-file-size-limitations-when-using-javascript-filereader-api
https://developer.mozilla.org/en-US/docs/Web/API/Blob/slice