问题
I was wondering how to programmatically fire a change event with YUI3 -- I added a change listener to one select box node:
Y.get('#mynode').on('change', function(e) {
Alert(“changed me”);
});
and somewhere else in the script want to fire that event. It works, of course, when a user changes the select box value in the browser. But I've tried many ways to fire it programmatically, none of which have worked. Including:
// All below give this error: T[X] is not a function (referring to what's called in .invoke(), // in the minified javascript
Y.get('#mynode').invoke('onchange');
Y.get('#mynode').invoke('change');
Y.get('#mynode').invoke('on','change');
Y.get('#mynode').invoke("on('change')");
/* Tried using .fire() which I found here:
* http://developer.yahoo.com/yui/3/api/EventTarget.html#method_fire
* Nothing happens
*/
Y.get('#mynode').fire('change');
/* Looking around the APIs some more, I found node-event-simulate.js:
* http://developer.yahoo.com/yui/3/api/node-event-simulate.js.html,
* which by its name would seem to have what I want. I tried:
* Error: simulate(): Event 'change' can't be simulated.
* ( (function(){var I={},B=new Date().getTim...if(B.isObject(G)){if(B.isArray(G)){E=1;\n)
*/
Y.get('#mynode').simulate('change');
Any help would be appreciated!
回答1:
YUI 3.0 does not support simulating the change
events, as you've discovered. However it will be supported in YUI 3.1. It is in the trunk now.
Your third attempt:
Y.get('#mynode').simulate('change');
should work in 3.1.
edit
It looks like you can just replace the YUI 3.0 version of event-simulate.js
with the trunk version, and it will work in an otherwise 3.0 app. I haven't seen any issues so far.
回答2:
The usual solution is not to programmatically fire the event, but rather move all the event logic to a function, and instead call that function from your code where appropriate.
Y.get('#mynode').on('change', function(e) {
AlertUserOfChange();
});
function AlertUserOfChange()
{
Alert(“changed me”);
}
回答3:
How about this
Y.Event.simulate('#mynode', 'change');
来源:https://stackoverflow.com/questions/1215012/yui-3-programmatically-fire-change-event