refactor(): change folder structure to be an actual hugo theme

static/js/theme.js

@@ -0,0 +1,35 @@
+(function() {
+    var elements = document.querySelectorAll('[data-open]');
+    for (var i=0; i<elements.length; i++) {
+        initOpen(elements[i]);
+    }
+
+    function initOpen(element) {
+        var className = 'open';
+        var target = document.getElementById(element.getAttribute('data-open'));
+        var ulChildrenMap = function(fn) {
+            var lists = target.getElementsByTagName('ul');
+            for (var i=0; i<lists.length; i++) {
+                fn(lists[i]);
+            }
+        };
+        if (!target) return;
+
+        // dirty hack for small screen ...
+        var firstChildUl = target.getElementsByTagName('ul')[0];
+        if (firstChildUl && window.getComputedStyle(firstChildUl).display === 'none') {
+            target.classList.remove(className);
+        }
+
+        element.addEventListener('click', function() {
+            var list = target.getElementsByTagName('ul')[0];
+            if (target.classList.contains(className)) {
+                target.classList.remove(className);
+                ulChildrenMap(function(ul) { ul.style.display = 'none'; });
+            } else {
+                target.classList.add(className);
+                ulChildrenMap(function(ul) { ul.style.display = 'block'; });
+            }
+        });
+    }
+})();