How to call a method based on a condition?

if (id === -1)
    chunk = await db
        .select({
            id: posts.id,
            content: posts.content,
        })
        .from(posts)
        .orderBy(desc(posts.id))
        .limit(6);
else
    chunk = await db
        .select({
            id: posts.id,
            content: posts.content,
        })
        .from(posts)
        .where(lt(posts.id, id) && eq(posts.hidden, hidden))
        .orderBy(desc(posts.id))
        .limit(6);