[Bug 28455] New: Add a method to add a one-time event listener

https://www.w3.org/Bugs/Public/show_bug.cgi?id=28455

            Bug ID: 28455
           Summary: Add a method to add a one-time event listener
           Product: WebAppsWG
           Version: unspecified
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: P2
         Component: DOM
          Assignee: annevk@annevk.nl
          Reporter: quanxunzhen@gmail.com
        QA Contact: public-webapps-bugzilla@w3.org
                CC: mike@w3.org, www-dom@w3.org

It seems to be a common pattern to have code like:

element.addEventListener("click", function onClick(event) {
  element.removeEventListener("click", onClick);
  ...
});

jQuery has method ".one()" to simplify this pattern.

I think it would be great if DOM directly includes a method for this in
EventTarget. Probably this method could be:

void listenForNextEvent(DOMString type, EventListener? callback, optional
boolean capture = false);

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Received on Thursday, 9 April 2015 21:38:07 UTC