Inline the submodule of themes/hermit with a git-subtree

Add 'themes/hermit/' from commit '56843f347a642324970ba30d58f23c64e037bb7c'

git-subtree-dir: themes/hermit
git-subtree-mainline: 7844fa5501c271b1b2b5ece2cb19f3202cd6e5ad
git-subtree-split: 56843f347a

themes/hermit/assets/js/main.js

@@ -0,0 +1,39 @@
+// addEventListener Helper
+//
+const listen = (ele, e, callback) => {
+  if (document.querySelector(ele) !== null) {
+    document.querySelector(ele).addEventListener(e, callback);
+  }
+}
+
+let header = document.getElementById('site-header');
+
+// Mobile Menu Toggle
+//
+let mobileMenuVisible = false;
+
+const toggleMobileMenu = () => {
+  let mobileMenu = document.getElementById('mobile-menu');
+  if (mobileMenuVisible == false) {
+    mobileMenu.style.animationName = 'bounceInRight';
+    mobileMenu.style.webkitAnimationName = 'bounceInRight';
+    mobileMenu.style.display = 'block';
+    mobileMenuVisible = true;
+  } else {
+    mobileMenu.style.animationName = 'bounceOutRight';
+    mobileMenu.style.webkitAnimationName = 'bounceOutRight'
+    mobileMenuVisible = false;
+  }
+}
+
+// ToC Toggle
+//
+const toggleToc = () => {
+  document.getElementById('toc').classList.toggle('show-toc');
+}
+
+
+if (header !== null) {
+  listen('#menu-btn', "click", toggleMobileMenu);
+  listen('#toc-btn', "click", toggleToc);
+}