When I call a function using a method, it’s returns undefined and Nan.
When it’s called counter.increment, it should return the input "init" + 1, counter.decrement should return "init" – 1 and counter.reset should return the initial value of "init". But instead for some reason, the three console.log returns undefined and the function createCounter returns NaN.
var createCounter = function(init) {
return {
increment: (init) => {
console.log(init);
return init++;
},
decrement: (init) => {
console.log(init);
return init--;
},
reset: (init) => {
console.log(init);
return init;
}
}
};
const counter = createCounter(5)
counter.increment(); // 6
counter.reset(); // 5
counter.decrement(); // 4
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