diff --git a/src/_h5ai/public/js/lib/ext/preview.js b/src/_h5ai/public/js/lib/ext/preview.js
index a4fb7b47..bda7b36b 100644
--- a/src/_h5ai/public/js/lib/ext/preview.js
+++ b/src/_h5ai/public/js/lib/ext/preview.js
@@ -21,7 +21,7 @@ const tplOverlay =
                     <li id="pv-bar-raw" class="bar-right"><a class="bar-button" target="_blank"><img src="${resource.image('preview-raw')}"/></a></li>
                     <li id="pv-bar-fullscreen" class="bar-right bar-button"><img src="${resource.image('preview-fullscreen')}"/></li>
                     <li id="pv-bar-next" class="bar-right bar-button"><img src="${resource.image('preview-next')}"/></li>
-                    <li id="pv-bar-idx" class="bar-right bar-label"/>
+                    <li id="pv-bar-idx" class="bar-right bar-label"></li>
                     <li id="pv-bar-prev" class="bar-right bar-button"><img src="${resource.image('preview-prev')}"/></li>
                 </ul>
             </div>
diff --git a/src/_h5ai/public/js/lib/ext/select.js b/src/_h5ai/public/js/lib/ext/select.js
index 6a733ea8..a463cd1d 100644
--- a/src/_h5ai/public/js/lib/ext/select.js
+++ b/src/_h5ai/public/js/lib/ext/select.js
@@ -24,7 +24,6 @@ const mabs = Math.abs;
 
 let dragStartX = 0;
 let dragStartY = 0;
-let isCtrlPressed = false;
 
 
 const publish = () => {
@@ -76,6 +75,7 @@ const selectionUpdate = ev => {
     const top = mmin(dragStartY, ev.pageY);
     const width = mabs(dragStartX - ev.pageX);
     const height = mabs(dragStartY - ev.pageY);
+    const isCtrlPressed = ev.ctrlKey || ev.metaKey;
 
     if (!isCtrlPressed && width < 4 && height < 4) {
         return;
@@ -127,7 +127,6 @@ const selectionStart = ev => {
         return;
     }
 
-    isCtrlPressed = ev.ctrlKey || ev.metaKey;
     dragStartX = ev.pageX;
     dragStartY = ev.pageY;