JavaScript get clipboard data on paste event (Cross browser)

Question

How can a web application detect a paste event and retrieve the data to be pasted?

I would like to remove HTML content before the text is pasted into a rich text edi

Answer 1

For cleaning the pasted text and replacing the currently selected text with the pasted text the matter is pretty trivial:

Paste

JS:

function handlepaste(el, e) {
  document.execCommand('insertText', false, e.clipboardData.getData('text/plain'));
  e.preventDefault();
}