Fix #1023: close sidebar after clicking a link on mobile

theme/javascript/platform.js

@@ -1,3 +1,5 @@
 module.exports = {
-    isMobile: /Android|webOS|iPhone|iPad|iPod|BlackBerry|IEMobile|Opera Mini/i.test(navigator.userAgent)
+    isMobile: function() {
+        return (document.width <= 600);
+    }
 };

theme/javascript/sidebar.js

@@ -25,9 +25,14 @@ function isOpen() {
 // Prepare sidebar: state and toggle button
 function init() {
     // Init last state if not mobile
-    if (!platform.isMobile) {
+    if (!platform.isMobile()) {
         toggleSidebar(storage.get('sidebar', true), false);
     }
+
+    // Close sidebar after clicking a link on mobile
+    $(document).on('click', '.book-summary li.chapter a', function(e) {
+        if (platform.isMobile()) toggleSidebar(false, false);
+    });
 }
 
 // Filter summary with a list of path