$.ajax({
    dataType: "json",
    url: "blog/posts.json",
    cache: false,
    success: function (json) {
        for (let i = json.length - 1; i >= 0; i--) {
            let post = json[i];
            if (!$("#blog-post-" + post["id"]).length)
                continue;

            let nav = "";
            if (i > 0)
                nav += '<a class="nav-item nav-link" href="/blog-' + json[i - 1]["id"] + '">Previous Post</a>';
            if (i < json.length - 1)
                nav += '<a class="nav-item nav-link" href="/blog-' + json[i + 1]["id"] + '">Next Post</a>';
            $("#nav-items").append(nav);
            break;
        }
    }
});