Symbol

A primitive data type representing a unique global symbol.

The symbol type is very similar to JavaScript's (MDN (opens new window)), but is not deeply integrated with the compiler yet.

Construction

• function Symbol(description?: string): symbol
  

  Creates a new unique symbol. Note that this is not a constructor (symbols are primitive data types) so cannot be invoked with new.

Static members

• function for(key: string): symbol
  

  Obtains the existing unique symbol for the specified global key or creates a new unique symbol if the key does not exist.

• function keyFor(sym: symbol): string | null
  

  Obtains the global key of the specified unique symbol, if any.

Instance members

• function toString(): string
  

  Returns a string representation of the symbol of the form "Symbol(key?)".