const post_permalinks = sessionStorage.getItem("post_permalinks").split(', '); const current_index = post_permalinks.indexOf(`'${location.href}'`) if (current_index > -1) { const permalink_after = post_permalinks[current_index+1] if (permalink_after) { for (const btn of document.getElementsByClassName('post_navigation')) { btn.classList.remove('d-none') btn.href = permalink_after.slice(1, -1) } } }