JS

let minusBtn = document.getElementById("minus");
let count = document.getElementById("quantity");
let plusBtn = document.getElementById("plus");

let countNum = 1;
count.innerHTML = countNum;

minusBtn.addEventListener("click", () => {
	if(count.value >= 1){
		countNum -= 1;
		count.value = countNum;
	}else{
		return
	}

});

plusBtn.addEventListener("click", () => {
	countNum += 1;
	count.value = countNum;
});