Sort books by publication year

1 files changed, 12 insertions, 1 deletions

diff --git a/js/app.js b/js/app.js
index 0a563a5..a8602f0 100644
--- a/js/app.js
+++ b/js/app.js
@@ -51,7 +51,7 @@ async function loadBooks() {
     const response = await fetch('data/books.json');
     if (!response.ok) throw new Error('Failed to load books');
     const data = await response.json();
-    state.books = data.books;
+    state.books = sortBooksByYear(data.books);
     state.filteredBooks = [...state.books];
     populateAuthorFilter();
   } catch (error) {
@@ -64,6 +64,17 @@ async function loadBooks() {
   }
 }
 
+function sortBooksByYear(books) {
+  return [...books].sort((a, b) => {
+    if (a.year !== b.year) return a.year - b.year;
+
+    const authorCompare = a.author.localeCompare(b.author);
+    if (authorCompare !== 0) return authorCompare;
+
+    return a.title.localeCompare(b.title);
+  });
+}
+
 // Populate author filter dropdown with unique authors
 function populateAuthorFilter() {
   const authors = [...new Set(state.books.map(book => book.author))].sort();