Why does extent-change fire 3 times when map is loading?

PLadd — Fri, 01 Apr 2016 14:56:24 GMT

I'm using the Tax Parcel Viewer and am trying to get the initial extent to fall where I want it when the map loads. To help me figure out what's going on I'm using the following listener:

var mapExtentChange = map.on("extent-change", changeHandler);

And

function changeHandler(evt) {

var extent = evt.extent,

zoomed = evt.levelChange;

alert('you moved');

}

This event fires 3 times while map is loading. When I use previous extent button, I can see what the previous extents were and it makes no sense.

How can I figure out what is making the extent-change fire three times when the map is initially loading? All this loading seems like a poor use of resources. Thanks.

Re: Why does extent-change fire 3 times when map is loading?

RobertScheitlin__GISP — Wed, 06 Apr 2016 13:51:39 GMT

Patrick,

Have you looked in the code for anything that is setting the maps extent like map.setExtent(xyz); You may have better luck posting an issue to the gitHub repo for this template. That way one of the template developer can respond.

topic Why does extent-change fire 3 times when map is loading? in ArcGIS JavaScript Maps SDK Questions

Why does extent-change fire 3 times when map is loading?

Re: Why does extent-change fire 3 times when map is loading?