Hallo von ecmascript specificationsIdentifier ecmascript 2017 Spezifikation
UnicodeIDStart::
any Unicode code point with the Unicode property "ID_Start"
UnicodeIDContinue::
any Unicode code point with the Unicode property "ID_Continue"
Was die Unicode-Eigenschaft "ID_Start" und "ID_Continue" sind?
https://en.wikipedia.org/wiki/Unicode_character_property – Bergi