Html client - promise operation error handling

Question

I use a lot of promise operations and they all work fine. However, I noticed when simulating an error (web api or service is 404 or something else goes wrong), the error function does not fire.  The screen just hangs on loading and
I have to refresh the browser.  The error function at the end of the promise operation does not execute or is not reached.  Everything works fine if the web api is up and running.  How do you handle these types of errors
to avoid a hanging screen?
msls.promiseOperation(callSomeFunction).then(function success(results) {
// do something
}, function (error) {
msls.showMessageBox(error.message, { title: error.title });
 

Answer 1

Hi Hessc,
 Everything works fine if the web api is up and running.  How do you handle these types of errors to avoid a hanging screen?
Similar code below to handle error:
myapp.commitChanges().done(function () {
msls.showMessageBox("Changes saved successfully.");
}, function (error) {
msls.showMessageBox(error.message, { title: error.title });
Best regards,
Angie
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