"The value returned from Apps Script has a type that cannot be used by the add-ons platform"

[M. Barrett]

Runtime error occurs when trying to return a numerical value (see below): 

var textInput = CardService.newTextInput()

.setFieldName("enteredDays")

.setTitle("Enter number of days to add.")

.setHint("Days")

.setOnChangeAction(CardService.newAction()

.setFunctionName("handleDaysChange"));

function handleDaysChange(e) {

entDays = e.commonEventObject.formInputs.enteredDays.stringInputs.value[0]

entDays = entDays * 86400000 // One day in milliseconds

if (isNaN(entDays)) {

console.log(entDays + " is not a number")

}else{

console.log(entDays + " is a number")

}

return entDays

isNaN(entDays) confirms entDays value is a number

Any help would be appreciated. Thanks

[Clark Lind]

I'm not well-versed to that level of the event object, and I know javascript usually interprets string input as numbers if they appear to be a number. 

I don't know if this will make a difference or not, but see if forcing it as a number helps:

entDays = e.commonEventObject.formInputs.enteredDays.stringInputs.value[0]

entDays = Number(entDays)

entDays = entDays * 86400000 // One day in milliseconds