活动中？ 把它关掉？

Question

On keyup my script does something, I was wondering if I could turn it off, as in, I only want it to check one key up.

ckEditorNewsArticle.document.on("keyup", function(){

Edit:

ckEditorNewsArticle.document.on('keyup', function(){
                      alert('key up');
                });

This works. But I cant get it to fire only once, by using one.

ckEditorNewsArticle.document.one('keyup', function(){
                      alert('one');
                });

Answer 1

You can turn off events using (surprise, surprise), .off() .

ckEditorNewsArticle.document.off('keyup');

If you want a handler to run only once though, might I suggest using .one() ?

ckEditorNewsArticle.document.one('keyup', function () {
    // do something
});

Answer 2

use .one() :

Attach a handler to an event for the elements. The handler is executed at most once per element.

Documentation: http://api.jquery.com/one/

Working example: http://jsfiddle.net/54ymc/