set cookie for sidebar preference

js/components/toggler.js

@@ -1,32 +1,14 @@
+import ToggleMixin from '../mixins/toggle'
+
 export default {
   name: 'toggler',
 
+  mixins: [ToggleMixin],
+
   props: {
     defaultVisible: {
       type: Boolean,
       default: () => false,
     },
   },
-
-  data: function() {
-    return {
-      isVisible: this.defaultVisible,
-    }
-  },
-
-  render: function(createElement) {
-    return createElement(this.$vnode.data.tag, [
-      this.$scopedSlots.default({
-        isVisible: this.isVisible,
-        toggle: this.toggle,
-      }),
-    ])
-  },
-
-  methods: {
-    toggle: function(e) {
-      e.preventDefault()
-      this.isVisible = !this.isVisible
-    },
-  },
 }