Hello, so, I have a block that can possibly return an error. I want to encapsulate error-prone logic in an error handling block. For example...
I think there is a block primitive for this functionality, I just forgor how it's called
P.S.: I want to detect if JS is on or not.
I was thinking of something like that 
But how do you import a library?
The file icon next to the right of the snap logo (left of the cloud) makes a menu appear when clicked. Choose libraries
Oooooh I understand! Thanks for helping 
The PRIMITIVE block got renamed to extension in snap 10.
Youre welcome!
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