Dodaliśmy trochę kodu, który pozwoli przetestować nasz magiczny licznik.
Dalej — odpalajmy!
function makeCounter() {
var count = 0;
function counter() {
count = count + 1;
return count;
}
return counter;
}
var doCount = makeCounter();
console.log(doCount());
console.log(doCount());
console.log(doCount());
Zaglądamy za kulisy…
Konsola JavaScript
1
2
3
Nasz licznik działa.
Uzyskaliśmy prawidłowe
wyniki.
Przeanalizujemy ten kod krok po kroku, by przekonać się,
jak działa.
function makeCounter() {
var count = 0;
function counter() {
count = count + 1;
return count;
}
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