update cktgen

Author: Yuxuan Hou

CktGen/index.html

@@ -4,6 +4,7 @@ window.HELP_IMPROVE_VIDEOJS = false;
 function toggleMoreWorks() {
     const dropdown = document.getElementById('moreWorksDropdown');
     const button = document.querySelector('.more-works-btn');
+    if (!dropdown || !button) return;
 
     if (dropdown.classList.contains('show')) {
         dropdown.classList.remove('show');
@@ -19,7 +20,8 @@ document.addEventListener('click', function(event) {
     const container = document.querySelector('.more-works-container');
     const dropdown = document.getElementById('moreWorksDropdown');
     const button = document.querySelector('.more-works-btn');
-    
+    if (!container || !dropdown || !button) return;
+
     if (container && !container.contains(event.target)) {
         dropdown.classList.remove('show');
         button.classList.remove('active');
@@ -31,6 +33,7 @@ document.addEventListener('keydown', function(event) {
     if (event.key === 'Escape') {
         const dropdown = document.getElementById('moreWorksDropdown');
         const button = document.querySelector('.more-works-btn');
+        if (!dropdown || !button) return;
         dropdown.classList.remove('show');
         button.classList.remove('active');
     }
@@ -40,36 +43,31 @@ document.addEventListener('keydown', function(event) {
 function copyBibTeX() {
     const bibtexElement = document.getElementById('bibtex-code');
     const button = document.querySelector('.copy-bibtex-btn');
+    if (!bibtexElement || !button) return;
     const copyText = button.querySelector('.copy-text');
-    
-    if (bibtexElement) {
-        navigator.clipboard.writeText(bibtexElement.textContent).then(function() {
-            // Success feedback
-            button.classList.add('copied');
-            copyText.textContent = 'Cop';
-            
-            setTimeout(function() {
-                button.classList.remove('copied');
-                copyText.textContent = 'Copy';
-            }, 2000);
-        }).catch(function(err) {
-            console.error('Failed to copy: ', err);
-            // Fallback for older browsers
-            const textArea = document.createElement('textarea');
-            textArea.value = bibtexElement.textContent;
-            document.body.appendChild(textArea);
-            textArea.select();
-            document.execCommand('copy');
-            document.body.removeChild(textArea);
-            
-            button.classList.add('copied');
-            copyText.textContent = 'Cop';
-            setTimeout(function() {
-                button.classList.remove('copied');
-                copyText.textContent = 'Copy';
-            }, 2000);
-        });
+
+    function showCopiedState() {
+        button.classList.add('copied');
+        copyText.textContent = 'Copied';
+
+        setTimeout(function() {
+            button.classList.remove('copied');
+            copyText.textContent = 'Copy';
+        }, 1800);
     }
+
+    navigator.clipboard.writeText(bibtexElement.textContent).then(function() {
+        showCopiedState();
+    }).catch(function(err) {
+        console.error('Failed to copy: ', err);
+        const textArea = document.createElement('textarea');
+        textArea.value = bibtexElement.textContent;
+        document.body.appendChild(textArea);
+        textArea.select();
+        document.execCommand('copy');
+        document.body.removeChild(textArea);
+        showCopiedState();
+    });
 }
 
 // Scroll to top functionality
@@ -83,6 +81,7 @@ function scrollToTop() {
 // Show/hide scroll to top button
 window.addEventListener('scroll', function() {
     const scrollButton = document.querySelector('.scroll-to-top');
+    if (!scrollButton) return;
     if (window.pageYOffset > 300) {
         scrollButton.classList.add('visible');
     } else {