App errors on setting change

[GadgetMOnster]

Hi All,

I have followed the settings guide as shown on https://dev.fitbit.com/guides/settings/ and every time  I change a colour in the companion app I get the following error in the console:

TypeError: undefined is not an object (evaluating 'evt.data.key')
onchange at companion/index.js:10

A screenshot of my companion index.js is below:

as you can see, I added some console logs to see check the code was being called. Prior to me adding lines 9 and 10, the same error occurred on line 11.

Any ideas?

[JonFitbit]

Can you try:

console.log(JSON.stringify(evt.data))

Then see what you're receiving.

[GadgetMOnster]

Hi Jon

Console says :

[GadgetMOnster]

Not sure if this makes a difference but I have configured this as an app (not a clock face) 

[JonFitbit]

Apps and clocks are the same, but you can only have 1 clock and clocks can't use buttons.

What happens if you log the contents of evt?

console.log(JSON.stringify(evt))

[GadgetMOnster]

Similar error but empty braces this time:

[JonFitbit]

Very strange, can I see your settings.jsx?

[GadgetMOnster]

Here you are

[GadgetMOnster · Accepted solution]

ok, so after much playing around the following seems to work:

 console.log(evt.key + " - " + evt.newValue);

although now I am getting all kinds of other errors. I will persevere ...