Hi Lebrun,
> Is there a mean to detect that a tiddler is about to close (in widget's
> code) ?
> In my widget, there is an animation with a periodic function launched
> every xx ms with setTimeout or with requestAnimationFrame().
> I would like to stop that function when tiddler closes, to free CPU if
> function is heavy or numerous widget instances. Ideally with an event
> listner.
>
>
I had the same problem. Unfortunately, no destructors exist. What you can
do is to check if the parent dom node is still part of the document in your
listener head. So next time the handler is called your listener deletes
itself.
Consider this:
TaskGraphWidget.prototype.handleResizeEvent = function(event) {
if(!document.body.contains(this.parentDomNode)) {
window.removeEventListener("resize", this.handleResizeEvent);
return;
}
... otherwise code
};
Hope it helps
Felix
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