Can you use dojo on.once() with map::update-end event?

[JerryGarcia]

If so, can someone provide example code?

Thanks!

[thejuskambi]

Hello Jerry,

I am not able to understand the objective of a example. on.once is a method in dojo, used to listen to an event only once. it would be similar to code below.

var handle = on(map, "click", function(evt){
   ...
   handle.remove();
}‍‍‍‍

It does not matter, which event. you can use on.once on any event, which you would like to listen just once.

[JerryGarcia]

Thanks.  But, it is not always that simple...    I want my code to fire only once. I have a couple callbacks when the event occurs.  So...  I need to wait until the callbacks are finished or, I was thinking, use the nifty on.once dojo functionality.  I'm still not clear how to invoke it's magic.  

None of the following works:

on.once(...);

on(...).once();

handle.once();

[RobertScheitlin__GISP · Accepted solution]

Jerry,

   I use dojo on.once quit often in code.

on.once(map, "update-end", function(){
    // will only fire once...
});‍‍‍‍‍‍

[Anonymous User]

This works as long as the dojo.on module is called first, like so:

require(["dojo/on"],
function(on) {
on.once(map, "update-end", function(){
    // will only fire once...
});
});

Thanks for this great tip!

[JerryGarcia]

I see.  Pretty simple.  Thanks!