Cross-browser method to prevent all methods of text copying from a textarea?

Question

I am working on an online typing software. In the typing software, all is going well but I have the problem of dishonest users who might possibly type the text into the text

Answer 1

Bind the event handlers and prevent the clipboard function like such:

$('textarea').on('copy paste cut drag drop', function (e) {
   e.preventDefault();
});