Function closePopup

tools/experiments/experiments.js:358–364

(affirmative)

  );
  const unlistenSet = [];
  const closePopup = (affirmative) => {
    container.classList.remove('show');
    unlistenSet.forEach((unlisten) => unlisten());
    if (affirmative) {
      callback();
    }
  };

  messageElement.textContent = message;
  unlistenSet.push(listenOnce(confirmButton, 'click', () => closePopup(true)));