How to handle errors in the sampleTerrain callback?

CesiumJS
1

Hello everyone,

I have this sandcastle sample:

I'd like to see the error message in the JS console. I haven't found documentation on how to handle the errors produced in the callback.

Could you help me please?
Thanks in advance!

2

b is undefined, so calling b.c throws an error message because you can’t read a property of undefined.

-Hannah

3

Yes, but the problem is, there should be an error appearing in the Javascript console, but it is never shown.

4

Maybe this example is more clear:

It obviosly has to crash on line 17, but the error doesn't appear in the console. It is a problem for me because it makes debugging hard. So the question is, can I handle it in some way?

5

Oh, sorry for misunderstanding your question.
The error is caught because it is happening inside the when callback. Here’s an example for how to handle errors with promises:

promise.then(function(updatedPositions) {
console.log(“message before the error”);

var a = b.c; // this should throw the error

console.log("message after the error");

}).otherwise(function(error) {
console.log(‘error handle here’);
});

``

Best,

Hannah

6

Thank you, Hannah! That's exactly what I was looking for.