Hello since Google maps can load custom places from .xml file, what about Arcgis, I found that they have example, but its saved in .json format, while i retrieved their example .json and put on my local server seems it can't load, so how to load custom places using Arcgis? Example: https://developers.arcgis.com/javascript/3/sandbox/sandbox.html?sample=fl_featureCollection
Did you validate the JSON to check it is correct? And is you Web Server configured to serve JSON MIME types?
No, how to configure it?
Well, what what web server are you running? You could probably find the procedure for setting the allowed MIME types through an online search. I'm not saying that is definitely the issue here, so maybe you can show some code?
My server is XAMPP based on windows for local server testing.
Well enabled:
application/vnd.geo+json
application/geo+json
what to do next?
Or at least where i could find in detail explained how to set up custom places?