Revert "Merge branch 'master' into dev"

This reverts commit 6a6d67dbab, reversing
changes made to ba4bd765d8.

docs/js/src/toggle-navigation.js

@@ -0,0 +1,42 @@
+/*
+ * Toggle navigation
+ *
+ * Pico.css - https://picocss.com
+ * Copyright 2019-2021 - Licensed under MIT
+ */
+
+export const toggleNavigation = {
+  
+  // Config
+  _state: 'closed-on-mobile',
+  toggleLink: document.getElementById('toggle-docs-navigation'),
+  nav: document.querySelector('main > aside > nav'),
+
+  // Init
+  init() {
+    this.onToggleClick()
+  },
+
+  onToggleClick() {
+    this.toggleLink.addEventListener('click', event => {
+      event.preventDefault();
+      this.state == 'closed-on-mobile' 
+        ? this.state = 'open' 
+        : this.state = 'closed-on-mobile';
+      this.nav.removeAttribute('class');
+      this.nav.classList.add(this.state);
+    }, false);
+  },
+
+  // Get state
+  get state() {
+    return this._state;
+  },
+
+  // Set state
+  set state(state) {
+    this._state = state;
+  },
+};
+
+export default toggleNavigation;