The scanner in node-jsonc-parser allows multiple non-standard whitespace chars to be accepted as a whitespace:

However, JSON specification allows only a handful of whitespace chars:

 ws = *( %x20 / ; Space %x09 / ; Horizontal tab %x0A / ; Line feed or New line %x0D ) ; Carriage return 

Difference in whitespace handling leads to interop problems with other JSON parsers, where input successfully parsed by node-jsonc-parser would fail to parse in Node or Python.