Conflict with Prototype.js when triggering a custom event called `update`

[christiedom@…]

Triggering a custom event called update inside a keyup/keydown event handler prevents default behaviour when Prototype.js is included. No exceptions are thrown, but keystrokes in a textarea (which trigger update) have no effect.

keyup test case: ​http://jsbin.com/finix/14/edit

This bug has been reproduced with jQuery versions:

• 1.8.3
• 1.9.1
• 1.10.2
• 1.11.0

with Prototype.js versions:

• 1.6.1.0
• 1.7.1

using the following Browsers:

• IE8 Win XP
• IE8 Win 7
• IE9 Win 7
• IE10 Win 7
• IE11 Win 7

Works as expected on recent versions of Chrome OS X (32.0.1700.102), Firefox OS X (27), and on IE6 and IE7 on Windows XP.

[dmethvin]

This is because Prototype adds an .update() method to the element.

​http://prototypejs.org/doc/latest/dom/Element/update/

Augmenting an object you don't own with non-standard methods is bad practice and the source of several problems with Prototype.

​As jQuery documents, when an event is fired on an element jQuery calls the corresponding DOM method if found. If you don't want that to happen, use .triggerHandler() rather than .trigger().