Symbol: Symbol.for()

Symbol.for for registering Symbols globally

• creates a new symbol (check via typeof)
• stores the symbol in a runtime-wide registry and retrieves it from there
• is different to Symbol() which creates a symbol every time and does not store it

.toString() on a Symbol

• also contains the key given to Symbol.for()

NOTE: the description of two different symbols

• might be the same
• but the symbols are not the same!