topic Re: JS ArcGIS API question in ArcGIS JavaScript Maps SDK Questions

JS ArcGIS API question

MeghanKulkarni — Sun, 12 Apr 2020 03:18:10 GMT

Hello,

I have one issue in code which I could not figure out. I'm making esriRequest function. Code details:

For some reason code followed by req.then executes first before what's code inside req.then (I added debugger to confirm this). Can someone help me understand why? Also, can someone help me fix it, please? I want to assign geotypeJson to response from lyrIdUrl.

Meghan Kulkarni#

Re: JS ArcGIS API question

RobertScheitlin__GISP — Sun, 12 Apr 2020 16:09:34 GMT

Meghan,

That is expected. The code following the .then is inline code that does not wait for the promise to resolve. So if you have code that is dependent on the request result then it has to inside the .then function.

Re: JS ArcGIS API question

MeghanKulkarni — Mon, 13 Apr 2020 13:49:29 GMT

Thanks Robert. Isn't my code in then function already?

req.then(function (response) {
debugger;
geotypeJson = response;
alert("Succeess");
}, function (error) {
console.log(error.message);
alert("ID Error");
});

Re: JS ArcGIS API question

RobertScheitlin__GISP — Mon, 13 Apr 2020 14:12:32 GMT

Meghan,

So I am not sure what's the question you have then.

You will always get to the debugger statemkent outside the .then function before you get to inside the debugger (as I mentioned earlier).

Re: JS ArcGIS API question

MeghanKulkarni — Mon, 13 Apr 2020 14:22:29 GMT

Hello Robert,

Basically I want to assign geotypeJson = response; as a consequence of esriRequest execution complete.

Re: JS ArcGIS API question

RobertScheitlin__GISP — Mon, 13 Apr 2020 14:26:56 GMT

Then you need to have anything that uses geoTypeJson wait for the .then to complete or have anything that uses it inside the .then.

Re: JS ArcGIS API question

MeghanKulkarni — Mon, 13 Apr 2020 18:10:21 GMT

Let me ask you in a bit of a different way. Is there a way to make esriRequest synchronous from default asynchronous?

Thanks.

Meghan Kulkarni

Re: JS ArcGIS API question

MeghanKulkarni — Mon, 13 Apr 2020 18:25:30 GMT

Nevermind. I found solution in the thread

https://community.esri.com/thread/190913-making-request-synchronous