We have textInput event implemented but there is no way to write event handlers inline for them. So we need ontextinput attribute for textInput as oninput attribute for input event.
Morita mentioned that this isn't in the spec, so we should try to get it added to the DOM Level 3 Events spec. I guess the risk is that some sites may already use this attribute and this would change the meaning of it. Maybe that's a really small risk (I don't know why a site would use a custom attribute for this).
I think this would be part of the HTML5 spec even though the textInput event is specced in DOM3. It's similar to key events, which are specced in DOM3. The on* properties are HTML specific.
https://www.w3.org/TR/uievents/#changes-drafts > The textInput event, originally proposed as a replacement for keypress, was removed in favor of the current beforeinput and input events. Do we need to do anything? Nothing IMO.
Is the textinput event supported in other browsers?