The formatting for a class that was added using ClassList isn't functioning as expected

Despite my code appearing correct, the styles are not being applied even though the class is added. It was functioning perfectly before, so I'm not sure what caused this issue now. Any assistance would be greatly appreciated!

JavaScript code:

let maxAmountMessageTimeoutId;
// Displaying Max Amount Added Message
export function displayMaxAmountMessage(productId) {
  const maxAmountMessage = document.querySelector(`.js-max-amount-message-${productId}`);

  maxAmountMessage.classList.add("max-amount-message-visible");

  if (maxAmountMessageTimeoutId) {
    clearTimeout(maxAmountMessageTimeoutId);
  }

  const timeoutId = setTimeout(() => {
    maxAmountMessage.classList.remove("max-amount-message-visible");
  }, 2000);

  maxAmountMessageTimeoutId = timeoutId;
  console.log(maxAmountMessage.className);
}

CSS code:

.max-amount-message {
  color: red;
  font-size: 15px;
  opacity: 0;
}

.max-amount-message-visible {
  opacity: 1;
}

I have attempted to place the function in the main file and declared "let maxAmountMessageTimeoutId;" as a global variable outside of the click event listener scope, but nothing seems to work. If I remove the line "let maxAmountMessageTimeoutId;", the message displays but errors occur and clearTimeout does not function properly.

Answer №1

Upon some investigation, I came across the issue and had a good laugh about it. It turns out that my code was actually correct; the problem lay elsewhere within my codebase.

// Increment Quantity Button
  document.querySelectorAll('.increment-quantity-button')
    .forEach((button) => {
      button.addEventListener('click', () => {
        const {productId} = button.dataset;

        
        updateSelectorValue();
        renderHeader();
        renderCheckoutTitle();
        renderOrderSummary();
        incrementCartQuantity(productId); // Contains the function displayMaxAmountMessage()
      });
    });

I had mistakenly placed the incrementCartQuantity(productId) function above all the other functions. The various "render" functions essentially refresh the HTML on the page, which explained why the message I hoped to display wasn't showing up due to the constant refreshing of the content. I had anticipated seeing at least a brief glimpse of it.

It hadn't crossed my mind that the order of function calls would be significant in this scenario - quite amusing!

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