1 files changed, 12 insertions, 6 deletions

diff --git a/content/lightbox.js b/content/lightbox.js
index 66facd6..e4a2c29 100644
--- a/content/lightbox.js
+++ b/content/lightbox.js
@@ -27,13 +27,14 @@
     }
 
     const setIndex = (i) => {
-        if (i < 0 || i >= thumbnailEls.length) {
+        if (i < 0 || i >= images.length) {
             return;
         }
-        thumbnailEls[currentIndex].classList.remove("is-selected");
+        images[currentIndex].thumbnailEl.classList.remove("is-selected");
         currentIndex = i;
         lightboxImgEl.src = figureEls[i].firstElementChild.href;
-        thumbnailEls[i].classList.add("is-selected");
+        lightboxImgEl.alt = images[currentIndex].description;
+        images[i].thumbnailEl.classList.add("is-selected");
     };
 
     const prev = () => {
@@ -48,7 +49,7 @@
     lightboxPrevEl.addEventListener("click", prev);
     lightboxNextEl.addEventListener("click", next);
     
-    const thumbnailEls = figureEls.map((figureEl, i) => {
+    const images = figureEls.map((figureEl, i) => {
         const go = e => {
             e.preventDefault();
             show();
@@ -72,7 +73,6 @@
         }
 
         anchorEl.addEventListener("click", go);
-
         const thumbnailButtonEl = document.createElement("button");
         const thumbnailImgEl = document.createElement("img");
 
@@ -89,7 +89,13 @@
 
         lightboxFooterEl.appendChild(thumbnailButtonEl);
 
-        return thumbnailButtonEl;
+        const captionEl = figureEl.querySelector("figcaption");
+        const description = captionEl?.innerHTML ?? "";
+
+        return {
+            thumbnailEl: thumbnailButtonEl,
+            description,
+        };
     });
 
     setIndex(0);