Ajax Error Handling (edit)
AJAX error handling with jQuery
https://jsfiddle.net/Sk8erPeter/AGpP5/
Handling Ajax errors with jQuery
https://thisinterestsme.com/handle-ajax-error-jquery/
jQuery Ajax handle exception thrown by WCF
https://www.codegateway.com/2012/04/jquery-ajax-handle-exception-thrown-by.html
jQuery AJAX
http://tutorials.jenkov.com/jquery/ajax.html
Returning a JsonResult within the Error function of JQuery Ajax
https://patrickdesjardins.com/blog/returning-a-jsonresult-within-the-error-function-of-jquery-ajax
Web API With AJAX: Exception Handling in jQuery Ajax() Function
https://visualstudiomagazine.com/blogs/tool-tracker/2015/10/return-server-side-errors-ajax.aspx
jQuery AJAX error handling: Show Custom Exception messages
https://www.aspsnippets.com/Articles/jQuery-AJAX-error-handling-Show-Custom-Exception-messages.aspx
How to Return AJAX Response from Asynchronous JavaScript Call: Methods and Code Examples
https://stackify.com/return-ajax-response-asynchronous-javascript-call/
How to Use jQuery's ajax() Function for Asynchronous HTTP Requests
https://www.sitepoint.com/use-jquerys-ajax-function/
A Beginner’s Guide to AJAX With jQuery
https://webdesign.tutsplus.com/tutorials/a-beginners-guide-to-ajax-with-jquery--cms-25126
Can I return custom error from JsonResult to jQuery ajax error method?
https://exceptionshub.com/can-i-return-custom-error-from-jsonresult-to-jquery-ajax-error-method.html
WCF & jQuery Ajax
https://www.codegateway.com/2012/04/create-wcf-service-to-call-by-jquery.html
https://www.codegateway.com/2012/04/configure-wcf-service-to-call-in-jquery.html
https://www.codegateway.com/2012/04/jquery-ajax-call-to-wcf-service.html
https://www.codegateway.com/2012/04/jquery-ajax-handle-exception-thrown-by.html
https://www.codegateway.com/2012/05/jquery-call-page-codebehind-method.html