variable doesn't change value

Question

why doesn't 'let right = 0' increase its value when I click on the target?

const game = document.querySelector('.game');
let cards = [];
const cardImg = 'url("img/cheese_';
let right = 0;

for(i = 1; i < 5; i += 1){
cards.push(cardImg + i + '.png")');
}

function playing (firstCard, lastCard, cardImg){
game.addEventListener('click', (e)=> matching(e, firstCard, lastCard, cardImg));
}

function matching (e, firstCard, lastCard, cardImg) {
if(e.target.className === firstCard || e.target.className === lastCard){
e.target.style.backgroundImage = cardImg;
e.target.innerHTML = '';
right += 1;
}
}

Answer 1

sorry guys, from the time I wrote the question I kept changing the code and solved the problem at some point. Sorry for not posting the question the right way, i'll keep you update if i need it

Answer 2

You can touch on my profile and see my codes on sololearn. Here's a few rules. You have a question about an unpredictable functioning of your code. How do you imagine giving an answer with an incomplete code?

Answer 3

Francesco Paolini hi,
Did the console report any error message?
You could post a link to your code if it is on sololearn.