Javascript digital signatures

To create a digital signature with the client certificate in javascript, there was a function: crypto.signtext() that doesn't work anymore

What is the easiest way to do 开发者_如何学Pythonthis now?

It hasn't gone away, it's just you have to spell it with a capital T. And still being Netscape/Mozilla/Firefox-only, it's of limited usefulness.

For me, the best solution is to use a browser extension like WebPKI