Zwraca pierwotną wartość obiektu String.
str.valueOf()Metoda valueOf() obiektu String zwraca pierwotną wartość obiektu String jako łańcuch znaków. Ta wartość jest równoważna do String.prototype.toString().
Ta metoda jest w JavaScript wywoływana zazwyczaj wewnętrznie, nie bezpośrednio w kodzie.
valueOf()var x = new String("Witaj świecie");
console.log(x.valueOf()); // Wyświetla "Witaj świecie"
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