CRITICAL: example error in functions chapter, writing-good-overloads section

Page URL: https://www.typescriptlang.org/docs/handbook/2/functions.html#writing-good-overloads

Issue:

the example is error:

Because both overloads have the same argument count and same return type, we can instead write a non-overloaded version of the function:

function len(x: any[] | string) {
  return x.length;
}

above has some problems in typescript playground:

No overload matches this call.
  Overload 1 of 2, '(s: string): number', gave the following error.
    Argument of type 'number[] | "hello"' is not assignable to parameter of type 'string'.
      Type 'number[]' is not assignable to type 'string'.
  Overload 2 of 2, '(arr: any[]): number', gave the following error.
    Argument of type 'number[] | "hello"' is not assignable to parameter of type 'any[]'.
      Type 'string' is not assignable to type 'any[]'.

correct is that:

function len(x: any[] | string): number;

Apri la pagina collegata di Functions Handbook e vai alla sezione “Writing good overloads”. Riproduci l’esempio segnalato in TypeScript Playground, quindi aggiorna l’esempio nella documentazione in modo che la forma mostrata corrisponda al comportamento previsto del controllo dei tipi. Verifica la pagina renderizzata e l’esempio dopo aver modificato il testo o il codice.