HTML: onpaste=“doSomething();” as invalid attribute

Question

I am checking my HTML code with Amaya.

I have an error on this line:

Answer 1

http://reference.sitepoint.com/html/extended-event-attributes/onpaste

"Non-standard event defined by Microsoft for use in Internet Explorer. May work in some other browsers but cannot be reliably used. Compatibility for this non-standard attribute not tested."