I'm attempting to add ArcGIS maps to a website that's on a restricted network (and therefore needs to work offline). I've been trying to get the ArcGIS ESRI maps running offline, but I'm not sure how it's supposed to be implemented. I added the arcgis_api_js folder to the root folder of my Visual Studio project (following the "AMD files hosted locally" instructions here: https://developers.arcgis.com/javascript/latest/install-and-set-up/), but when I try to reference the file mentioned, I get the error Loading failed for the <script> with source "http://localhost:57698/arcgis_js_api/library/4.18/dojo".

In my init.js and dojo.js files (referenced on the web page using the map) I set the baseURL to the address above with the intention of changing it to the IIS address used by our restricted network when live.

Is there something I missed or is it not possible to run the maps locally without hosting the api library on a server at the same time?

For reference my .aspx page has this reference to the dojo file:

<script src="../arcgis_js_api/library/4.18/dojo/dojo.js">

And the dojo.js and init.js have this code replacing the boilerplate baseURL:


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