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Kevin B

Question about the upcoming methods .on() and .off()

in Developing jQuery Core • 9 years ago

I can understand the purpose of .on() because its just like the native way of binding events:

el.onclick = function

however, .off() doesn't really fit... you aren't turning the event off, you are removing it, however I don't know what else you could call it.

Why can't we just add an optional parameter to .bind() and .unbind() to take care of the extra use cases, then depreciate .live .die .delegate and .undelegate?

I think this is really just a question of naming.

-- Kevin

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dave.meth..

Re: Question about the upcoming methods .on() and .off()

9 years ago

A few things:

.on() and .off() is less typing and a bit more clear (imo) that you are attaching events (think "put on and take off the event" not "turn off the event")
.bind() has always meant non-delegated events so it might be confusing to add that functionality
ES5 now has a Function.bind method and I would like to steer clear of that word
The name of the .on() method makes it very clear the first arg is the event(s)
In looking at existing code I found cases where people were passing strings as the data arg; existing calls would potentially be misinterpreted as a selector if we tried to extend .bind()
We don't have any plans to remove the old event methods for quite a while

Kevin B

Re: Re: Question about the upcoming methods .on() and .off()

9 years ago

sounds good,

-- Kevin

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