That worked! You can see our app in action here, we use your service for our app!
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I checked the error log and this is what I see. It looks like the two variables are not coming through the mapping correctly.

User transformation function exception. Reason: otherType is not defined

Thanks for your help. I added this mapping code per the attached screen shot and the results are the same. There is no mapping. Any ideas?

Yes, I want to display either Value1 or Value2 for each row of data depending on whether Value1 is blank or not.

App is shared. Run the browser test and click 'Help' to get to the test page, then enter some text and click the Button to see the result.

This did not work either. I was able to get an alert to pop up, but there was no data displayed.

I create a localstorage variable when the button is clicked by binding the value to the input text field.

I tried this and it did not work either. Just for context, I am able to create a test page that takes an input string, saves it to local storage then displays it when a button is pressed so I am confused as to why this simply string processing is not working as expected.

BTW: Thanks for all your help - I appreciate it! Todd