I am trying to use esri/request to pull in some data from an API. I am have two weird problems. First, when I try to run this, it doesn't complete and throws the following error in the browser console: "Uncaught TypeError: Cannot read property 'trim' of undefined". I am not using trim()anywhere and am not sure why this error is being thrown (specifically on the line where I make my esriRequest). Second, if I try to test this in the browser by pasting in the function to the console, it says that esriRequest is not defined. I have checked the order of my required list and functions several times and they look like they are in the proper order. Am I missing something here? require ([ "esri/map" , "esri/basemaps" , "esri/dijit/BasemapToggle" , "esri/layers/ArcGISDynamicMapServiceLayer" , "esri/tasks/ImageServiceIdentifyTask" , "esri/tasks/ImageServiceIdentifyParameters" , "esri/layers/WebTiledLayer" , "esri/dijit/Search" , "esri/config" , "esri/request" , " dojo/json" , "dojo/promise/all" , "dojo/domReady!" ], function ( Map , esriBasemaps , BasemapToggle , ArcGISDynamicMapServiceLayer , ImageServiceIdentifyTask , ImageServiceIdentifyParameters , WebTiledLayer , Search , esriConfig , esriRequest , JSON , all ) { ..... var url = "https://earthquake.usgs.gov/ws/designmaps/asce7-16.json?latitude=18&longitude=-66&riskCategory=I&siteClass=D&title=Default" ; esriRequest ( url , { responseType : "json" }). then ( function ( response ){ // The requested data var seis_data = response . data ; });

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Why is esriRequest not working?

JustinBridwell2

I am trying to use esri/request to pull in some data from an API. I am have two weird problems. First, when I try to run this, it doesn't complete and throws the following error in the browser console: "Uncaught TypeError: Cannot read property 'trim' of undefined". I am not using trim()anywhere and am not sure why this error is being thrown (specifically on the line where I make my esriRequest). Second, if I try to test this in the browser by pasting in the function to the console, it says that esriRequest is not defined. I have checked the order of my required list and functions several times and they look like they are in the proper order. Am I missing something here?

<SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">require</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">([</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">    
</SPAN><SPAN class="" style="color: #7d2727; border: 0px; font-weight: inherit; font-size: 13px;">"esri/map"</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">,</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">    
</SPAN><SPAN class="" style="color: #7d2727; border: 0px; font-weight: inherit; font-size: 13px;">"esri/basemaps"</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">,</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">    
</SPAN><SPAN class="" style="color: #7d2727; border: 0px; font-weight: inherit; font-size: 13px;">"esri/dijit/BasemapToggle"</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">,</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">    
</SPAN><SPAN class="" style="color: #7d2727; border: 0px; font-weight: inherit; font-size: 13px;">"esri/layers/ArcGISDynamicMapServiceLayer"</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">,</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">    
</SPAN><SPAN class="" style="color: #7d2727; border: 0px; font-weight: inherit; font-size: 13px;">"esri/tasks/ImageServiceIdentifyTask"</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">,</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">    
</SPAN><SPAN class="" style="color: #7d2727; border: 0px; font-weight: inherit; font-size: 13px;">"esri/tasks/ImageServiceIdentifyParameters"</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">,</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">    
</SPAN><SPAN class="" style="color: #7d2727; border: 0px; font-weight: inherit; font-size: 13px;">"esri/layers/WebTiledLayer"</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">,</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">    
</SPAN><SPAN class="" style="color: #7d2727; border: 0px; font-weight: inherit; font-size: 13px;">"esri/dijit/Search"</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">,</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">    
</SPAN><SPAN class="" style="color: #7d2727; border: 0px; font-weight: inherit; font-size: 13px;">"esri/config"</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">,</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">    
</SPAN><SPAN class="" style="color: #7d2727; border: 0px; font-weight: inherit; font-size: 13px;">"esri/request"</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">,</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">    
"</SPAN><SPAN class="" style="color: #7d2727; border: 0px; font-weight: inherit; font-size: 13px;">dojo/json"</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">,</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">    
</SPAN><SPAN class="" style="color: #7d2727; border: 0px; font-weight: inherit; font-size: 13px;">"dojo/promise/all"</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">,</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">      
</SPAN><SPAN class="" style="color: #7d2727; border: 0px; font-weight: inherit; font-size: 13px;">"dojo/domReady!"</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">],</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;"> </SPAN><SPAN class="" style="color: #101094; border: 0px; font-weight: inherit; font-size: 13px;">function</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">(</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">        
</SPAN><SPAN class="" style="color: #2b91af; border: 0px; font-weight: inherit; font-size: 13px;">Map</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">,</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">          
esriBasemaps</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">,</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">          
</SPAN><SPAN class="" style="color: #2b91af; border: 0px; font-weight: inherit; font-size: 13px;">BasemapToggle</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">,</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">          
</SPAN><SPAN class="" style="color: #2b91af; border: 0px; font-weight: inherit; font-size: 13px;">ArcGISDynamicMapServiceLayer</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">,</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">          
</SPAN><SPAN class="" style="color: #2b91af; border: 0px; font-weight: inherit; font-size: 13px;">ImageServiceIdentifyTask</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">,</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">          
</SPAN><SPAN class="" style="color: #2b91af; border: 0px; font-weight: inherit; font-size: 13px;">ImageServiceIdentifyParameters</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">,</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">          
</SPAN><SPAN class="" style="color: #2b91af; border: 0px; font-weight: inherit; font-size: 13px;">WebTiledLayer</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">,</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">          
</SPAN><SPAN class="" style="color: #2b91af; border: 0px; font-weight: inherit; font-size: 13px;">Search</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">,</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">          
esriConfig</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">,</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">          
esriRequest</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">,</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">          
JSON</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">,</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">          
all</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">)</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;"> </SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">{</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">         
</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">.....</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">       
</SPAN><SPAN class="" style="color: #101094; border: 0px; font-weight: inherit; font-size: 13px;">var</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;"> url </SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">=</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;"> </SPAN><SPAN class="" style="color: #7d2727; border: 0px; font-weight: inherit; font-size: 13px;">"https://earthquake.usgs.gov/ws/designmaps/asce7-16.json?latitude=18&longitude=-66&riskCategory=I&siteClass=D&title=Default"</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">;</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">      
esriRequest</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">(</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">url</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">,</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;"> </SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">{</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">        
    responseType</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">:</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;"> </SPAN><SPAN class="" style="color: #7d2727; border: 0px; font-weight: inherit; font-size: 13px;">"json"</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">      
</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;"> }).</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">then</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">(</SPAN><SPAN class="" style="color: #101094; border: 0px; font-weight: inherit; font-size: 13px;">function</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">(</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">response</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">){</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">         
</SPAN><SPAN class="" style="color: #858c93; border: 0px; font-weight: inherit; font-size: 13px;">// The requested data</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">        
</SPAN><SPAN class="" style="color: #101094; border: 0px; font-weight: inherit; font-size: 13px;">    var</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;"> seis_data </SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">=</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;"> response</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">.</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">data</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">;</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">      
</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">});</SPAN>

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rscheitlin

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rscheitlin

Justin,

Most likely you are trying to access the results before they have returned then. You have to understand the nature of a async call.

JustinBridwell2

OK, fixed it (I think). When I launched it this time, I got `Success: {pgauh: 0.383, pgad: 1798.2, pga: 0.383, fpga: 1.217, pgam: 0.466, …}` showing in the console. So I get an Object. But if I try typing `console.log(layersRequest)' in the console, it's still saying its not defined. I don't get it! What I want to do now is pull out the value for s1 from the object into a variable that I will later display in the dom in a table. I thought I could test this out in my console first; not sure what's wrong.

rscheitlin

Justin,

So it sounds like when you added "esri/config" you got your requires and subsequent parameters out of order.

JustinBridwell2

Ugh, OK, it is actually not working. I resolved the CORS issue but now I am seeing that `layerRequest` is not defined! Assuming I am going to continue with 3.x, is there something I need to change in my require calls and corresponding functions?

rscheitlin

Justin,

Sure. Just add:

<SPAN class="token function">require</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">[</SPAN>
<SPAN class="punctuation token">.</SPAN><SPAN class="punctuation token">.</SPAN><SPAN class="punctuation token">.</SPAN>
        <SPAN class="string token">"esri/config"</SPAN><SPAN class="punctuation token">,</SPAN>
<SPAN class="punctuation token">.</SPAN><SPAN class="punctuation token">.</SPAN><SPAN class="punctuation token">.</SPAN>
      <SPAN class="punctuation token">]</SPAN><SPAN class="punctuation token">,</SPAN>
      <SPAN class="keyword token">function</SPAN><SPAN class="punctuation token">(</SPAN>
<SPAN class="punctuation token">.</SPAN><SPAN class="punctuation token">.</SPAN><SPAN class="punctuation token">.</SPAN>
        esriConfig<SPAN class="punctuation token">,</SPAN>
<SPAN class="punctuation token">.</SPAN><SPAN class="punctuation token">.</SPAN><SPAN class="punctuation token">.</SPAN>
      <SPAN class="punctuation token">)</SPAN> <SPAN class="punctuation token">{</SPAN>
<SPAN class="punctuation token">.</SPAN><SPAN class="punctuation token">.</SPAN><SPAN class="punctuation token">.</SPAN>
<SPAN class="comment token">// Use CORS</SPAN>
        esriConfig<SPAN class="punctuation token">.</SPAN>defaults<SPAN class="punctuation token">.</SPAN>io<SPAN class="punctuation token">.</SPAN>corsEnabledServers<SPAN class="punctuation token">.</SPAN><SPAN class="token function">push</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="string token">"earthquake.usgs.gov"</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN> <SPAN class="comment token">// supports CORS‍‍‍‍‍‍‍‍‍‍‍‍‍</SPAN><SPAN class="line-numbers-rows"><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN></SPAN>

JustinBridwell2

OK, that seemed to resolve the initial issue! Thanks so much Robert. Follow up question though; I am now getting the old "Cross-Origin Read Blocking (CORB) blocked cross-origin response ...<url> ... with MIME type application/json" error. From looking at a few related post, it seems this is cause by the server sending back a jsonp response or something? Is there an easy way to resolve this inside the code?

rscheitlin

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rscheitlin

Justin,

Yes the issue is the esriRequest. The code format you are using is for 4.x and will not work in 3.x.

in 3.x it looks like this:

<SPAN class="keyword token">var</SPAN> layersRequest <SPAN class="operator token">=</SPAN> <SPAN class="token function">esriRequest</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">{</SPAN>
    url<SPAN class="punctuation token">:</SPAN> <SPAN class="string token">"https://earthquake.usgs.gov/ws/designmaps/asce7-16.json"</SPAN><SPAN class="punctuation token">,</SPAN>
    content<SPAN class="punctuation token">:</SPAN> <SPAN class="punctuation token">{</SPAN> <SPAN class="string token">"latitude"</SPAN><SPAN class="punctuation token">:</SPAN> <SPAN class="number token">18</SPAN><SPAN class="punctuation token">,</SPAN> <SPAN class="string token">"longitude"</SPAN><SPAN class="punctuation token">:</SPAN> <SPAN class="operator token">-</SPAN><SPAN class="number token">66</SPAN><SPAN class="punctuation token">,</SPAN> <SPAN class="string token">"riskCategory"</SPAN><SPAN class="punctuation token">:</SPAN> <SPAN class="string token">"I"</SPAN><SPAN class="punctuation token">,</SPAN> <SPAN class="string token">"siteClass"</SPAN><SPAN class="punctuation token">:</SPAN> <SPAN class="string token">"D"</SPAN><SPAN class="punctuation token">,</SPAN> title<SPAN class="operator token">=</SPAN><SPAN class="string token">"Default"</SPAN><SPAN class="punctuation token">}</SPAN><SPAN class="punctuation token">,</SPAN>
    handleAs<SPAN class="punctuation token">:</SPAN> <SPAN class="string token">"json"</SPAN><SPAN class="punctuation token">,</SPAN>
    callbackParamName<SPAN class="punctuation token">:</SPAN> <SPAN class="string token">"callback"</SPAN>
  <SPAN class="punctuation token">}</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>
  layersRequest<SPAN class="punctuation token">.</SPAN><SPAN class="token function">then</SPAN><SPAN class="punctuation token">(</SPAN>
    <SPAN class="keyword token">function</SPAN><SPAN class="punctuation token">(</SPAN>response<SPAN class="punctuation token">)</SPAN> <SPAN class="punctuation token">{</SPAN>
      <SPAN class="keyword token">var</SPAN> seis_data <SPAN class="operator token">=</SPAN> response<SPAN class="punctuation token">.</SPAN>response<SPAN class="punctuation token">.</SPAN>data<SPAN class="punctuation token">;</SPAN>
      console<SPAN class="punctuation token">.</SPAN><SPAN class="token function">log</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="string token">"Success: "</SPAN><SPAN class="punctuation token">,</SPAN> response<SPAN class="punctuation token">.</SPAN>response<SPAN class="punctuation token">.</SPAN>data<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>
  <SPAN class="punctuation token">}</SPAN><SPAN class="punctuation token">,</SPAN> <SPAN class="keyword token">function</SPAN><SPAN class="punctuation token">(</SPAN>error<SPAN class="punctuation token">)</SPAN> <SPAN class="punctuation token">{</SPAN>
      console<SPAN class="punctuation token">.</SPAN><SPAN class="token function">log</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="string token">"Error: "</SPAN><SPAN class="punctuation token">,</SPAN> error<SPAN class="punctuation token">.</SPAN>message<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>
  <SPAN class="punctuation token">}</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍<SPAN class="line-numbers-rows"><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN></SPAN>

JustinBridwell2

Sorry, I am refactoring some of this code from another application. I believe it is 3x not 4.1. Could this be part of the problem? The map displays properly when I remove the esriRequest call at the bottom, but I am wondering if some of the other libraries/modules I am using are causing the issue. I tried moving esri/request and esriRequest to the top, but it didn't seem to make a difference.

rscheitlin

Justin,

You seem to be mixed 4.x and 3.x code... Which are you using? Your tag says 4.1 but you have a require for "esri/map" which is 3.x in 4.x it is "esri/Map", also there is no "esri/basemaps" in 4.x, etc, etc.

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