FIX: use touch detection for hamburger menu trigger

Author: hyeondo-jang

contact.html

@@ -169,7 +169,7 @@ <h2>Contact</h2>
 
 </div>
 <script>
-    if (window.screen.width < 640) {
+    if ('ontouchstart' in window || navigator.maxTouchPoints > 0) {
         var toggle = document.querySelector('.menu-toggle');
         var nav = document.querySelector('nav');
         toggle.style.display = 'block';

group.html

@@ -379,7 +379,7 @@ <h3>Alumni</h3>
 
 </div>
 <script>
-    if (window.screen.width < 640) {
+    if ('ontouchstart' in window || navigator.maxTouchPoints > 0) {
         var toggle = document.querySelector('.menu-toggle');
         var nav = document.querySelector('nav');
         toggle.style.display = 'block';

hiring.html

@@ -256,7 +256,7 @@ <h2 class="red-title">All</h2>
 
 </div>
 <script>
-    if (window.screen.width < 640) {
+    if ('ontouchstart' in window || navigator.maxTouchPoints > 0) {
         var toggle = document.querySelector('.menu-toggle');
         var nav = document.querySelector('nav');
         toggle.style.display = 'block';

index.html

@@ -309,7 +309,7 @@ <h3>Acknowledgements</h3>
 
 </div>
 <script>
-    if (window.screen.width < 640) {
+    if ('ontouchstart' in window || navigator.maxTouchPoints > 0) {
         var toggle = document.querySelector('.menu-toggle');
         var nav = document.querySelector('nav');
         toggle.style.display = 'block';

publications.html

@@ -433,7 +433,7 @@ <h2>Publications</h2>
 
 </div>
 <script>
-    if (window.screen.width < 640) {
+    if ('ontouchstart' in window || navigator.maxTouchPoints > 0) {
         var toggle = document.querySelector('.menu-toggle');
         var nav = document.querySelector('nav');
         toggle.style.display = 'block';

research.html

@@ -262,7 +262,7 @@ <h2>Collaborators</h2>
 
 </div>
 <script>
-    if (window.screen.width < 640) {
+    if ('ontouchstart' in window || navigator.maxTouchPoints > 0) {
         var toggle = document.querySelector('.menu-toggle');
         var nav = document.querySelector('nav');
         toggle.style.display = 'block';