(() => {
    const slots = [];
    function choose(slot, choices) {
        const selected = choices[Math.floor(Math.random() * choices.length)];
        slot.replaceChildren(selected.content.cloneNode(true));
        slot.dataset.adSelected = selected.dataset.adChoice;
        slot.hidden = false;
    }
    document.querySelectorAll('[data-random-article-ad]').forEach(slot => {
        const choices = Array.from(slot.querySelectorAll('template[data-ad-choice]'));
        if (!choices.length) return;
        slots.push({ slot, choices });
        choose(slot, choices);
    });
    window.addEventListener('pageshow', event => {
        if (event.persisted) slots.forEach(({ slot, choices }) => choose(slot, choices));
    });
})();