Bug Tracker

Opened 10 years ago

Closed 9 years ago

Last modified 9 years ago

#11934 closed feature (wontfix)

Enhancement: allow ":once" on event names to indicate one() variant event binding

Reported by: getify Owned by:
Priority: low Milestone: None
Component: event Version: 1.7.2
Keywords: 1.9-discuss Cc:
Blocked by: Blocking:


I am a big fan of the "one()" functionality. But I have a suggestion for a small piece of sugar to extend it:

Allow me to put ":once" on the end of any event name in any of the event binding APIs (bind, on, etc) which tells jQuery to use the "one()" variant for the binding of that particular event. For example:

// vs. $("a").one("click",handle)
$("#foobar").on("mousedown:once mouseup","a",handle)
// vs. $("#foobar").one("mousedown","a",handle).on("mouseup","a",handle)

Change History (11)

comment:1 Changed 10 years ago by dmethvin

Component: unfiledevent
Keywords: 1.9-discuss added
Milestone: None1.9
Priority: undecidedlow
Status: newopen
Type: enhancementfeature

There might be a case to be made for a CSS-selectors-like handling of the event string, but I'm not a fan of making an exception for ":once" alone. Also, many external users are now using the ":" character in their custom event strings so we would need to be very careful about creating compatibility issues. I'll mark it for 1.9 discussion.

comment:2 Changed 10 years ago by getify

FWIW, Mootools has a whole system of "Event Pseudos", including ":once"...


Perhaps that's a pattern jQuery could consider for this.

comment:3 Changed 9 years ago by dmethvin

-1, This doesn't fit in at all with our string event syntax, and the colon char is used by frameworks.

comment:4 Changed 9 years ago by mikesherov

-1, Seems almost too late for jQuery to do this now.

comment:5 Changed 9 years ago by gibson042

-1, I'd rather not mix extra logic into event type.

comment:6 Changed 9 years ago by mikesherov


comment:7 Changed 9 years ago by Rick Waldron

-1, No new custom selectors. No new event system complexities

comment:8 Changed 9 years ago by gibson042


comment:9 Changed 9 years ago by gnarf

-1, Dave brings up points I agree with

comment:10 Changed 9 years ago by mikesherov

Resolution: wontfix
Status: openclosed

comment:11 Changed 9 years ago by dmethvin

Milestone: 1.9None
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