SMPS without transformer or opto? (VIPer22A)

[Pha5e]

I just came across this SMPS circuit on the DigiKey website:

Is it really possible to implement a 12V 350mA output SMPS with wide mains input voltage without a transformer or an opto-isolator?

The datasheet for the VIPer22A shows transformers and opto-isolators used in various application circuits.

Is the design safe as there is no isolation between the input and output?

 

[FvM]

What are you exactly asking? Obviously the circuit doesn't provide safe insulation. So it's only suited for applications that don't need it.