How to handle a 404 error so that it is not visible in the browser?

Question

Angular

I would like to fix this in js, you can make the api give an empty result , but this is not correct.
In Figure 0, the code from the factory

In Figure 1, the code that handles the error
Figure

1 Figure 2 shows that the processing works, but the error is still displayed ...
Figure 2

How to prevent it from being displayed?