diff --git a/packages/accordion/src/vaadin-accordion.js b/packages/accordion/src/vaadin-accordion.js
index a772414a0b6..6e31d2b664a 100644
--- a/packages/accordion/src/vaadin-accordion.js
+++ b/packages/accordion/src/vaadin-accordion.js
@@ -138,6 +138,7 @@ class Accordion extends ThemableMixin(ElementMixin(PolymerElement)) {
     }
   }
 
+  /** @protected */
   ready() {
     super.ready();
 
diff --git a/packages/checkbox-group/src/vaadin-checkbox-group.js b/packages/checkbox-group/src/vaadin-checkbox-group.js
index ca96d13ab5b..681d96a70da 100644
--- a/packages/checkbox-group/src/vaadin-checkbox-group.js
+++ b/packages/checkbox-group/src/vaadin-checkbox-group.js
@@ -142,6 +142,7 @@ class CheckboxGroup extends FieldMixin(FocusMixin(DisabledMixin(ElementMixin(The
     this.__onCheckboxCheckedChanged = this.__onCheckboxCheckedChanged.bind(this);
   }
 
+  /** @protected */
   ready() {
     super.ready();
 
diff --git a/packages/component-base/src/controller-mixin.js b/packages/component-base/src/controller-mixin.js
index c207185fdd7..5059104322f 100644
--- a/packages/component-base/src/controller-mixin.js
+++ b/packages/component-base/src/controller-mixin.js
@@ -5,6 +5,11 @@
  */
 import { dedupingMixin } from '@polymer/polymer/lib/utils/mixin.js';
 
+/**
+ * @typedef ReactiveController
+ * @type {import('lit').ReactiveController}
+ */
+
 /**
  * A mixin for connecting controllers to the element.
  *
@@ -17,7 +22,7 @@ export const ControllerMixin = dedupingMixin(
         super();
 
         /**
-         * @type {Set<import('lit').ReactiveController>}
+         * @type {Set<ReactiveController>}
          */
         this.__controllers = new Set();
       }
@@ -47,7 +52,7 @@ export const ControllerMixin = dedupingMixin(
       /**
        * Registers a controller to participate in the element update cycle.
        *
-       * @param {import('lit').ReactiveController} controller
+       * @param {ReactiveController} controller
        * @protected
        */
       addController(controller) {
@@ -61,7 +66,7 @@ export const ControllerMixin = dedupingMixin(
       /**
        * Removes a controller from the element.
        *
-       * @param {import('lit').ReactiveController} controller
+       * @param {ReactiveController} controller
        * @protected
        */
       removeController(controller) {
diff --git a/packages/details/src/vaadin-details.js b/packages/details/src/vaadin-details.js
index 1923f7dae84..f1e127f223a 100644
--- a/packages/details/src/vaadin-details.js
+++ b/packages/details/src/vaadin-details.js
@@ -131,6 +131,7 @@ class Details extends ShadowFocusMixin(ElementMixin(ThemableMixin(PolymerElement
     return this.shadowRoot.querySelector('[part="summary"]');
   }
 
+  /** @protected */
   ready() {
     super.ready();
     const uniqueId = (Details._uniqueId = 1 + Details._uniqueId || 0);
diff --git a/packages/grid/src/vaadin-grid-active-item-mixin.js b/packages/grid/src/vaadin-grid-active-item-mixin.js
index 1df7a32dc16..9b37344cb07 100644
--- a/packages/grid/src/vaadin-grid-active-item-mixin.js
+++ b/packages/grid/src/vaadin-grid-active-item-mixin.js
@@ -24,6 +24,7 @@ export const ActiveItemMixin = (superClass) =>
       };
     }
 
+    /** @protected */
     ready() {
       super.ready();
 
diff --git a/packages/grid/src/vaadin-grid-column-reordering-mixin.js b/packages/grid/src/vaadin-grid-column-reordering-mixin.js
index 87c02dd8843..31be3bc91a7 100644
--- a/packages/grid/src/vaadin-grid-column-reordering-mixin.js
+++ b/packages/grid/src/vaadin-grid-column-reordering-mixin.js
@@ -35,6 +35,7 @@ export const ColumnReorderingMixin = (superClass) =>
       return ['_updateOrders(_columnTree, _columnTree.*)'];
     }
 
+    /** @protected */
     ready() {
       super.ready();
       addListener(this, 'track', this._onTrackEvent);
diff --git a/packages/grid/src/vaadin-grid-column-resizing-mixin.js b/packages/grid/src/vaadin-grid-column-resizing-mixin.js
index 5efbafec64e..da35c2e132a 100644
--- a/packages/grid/src/vaadin-grid-column-resizing-mixin.js
+++ b/packages/grid/src/vaadin-grid-column-resizing-mixin.js
@@ -10,6 +10,7 @@ import { addListener } from '@vaadin/component-base/src/gestures.js';
  */
 export const ColumnResizingMixin = (superClass) =>
   class ColumnResizingMixin extends superClass {
+    /** @protected */
     ready() {
       super.ready();
       const scroller = this.$.scroller;
diff --git a/packages/icon/src/vaadin-icon.js b/packages/icon/src/vaadin-icon.js
index a77ffeccbab..c8f5a560f97 100644
--- a/packages/icon/src/vaadin-icon.js
+++ b/packages/icon/src/vaadin-icon.js
@@ -163,11 +163,13 @@ class Icon extends ThemableMixin(ElementMixin(PolymerElement)) {
     }
   }
 
+  /** @protected */
   connectedCallback() {
     super.connectedCallback();
     document.addEventListener('vaadin-iconset-registered', this.__onIconsetRegistered);
   }
 
+  /** @protected */
   disconnectedCallback() {
     super.disconnectedCallback();
     document.removeEventListener('vaadin-iconset-registered', this.__onIconsetRegistered);
diff --git a/packages/list-box/src/vaadin-list-box.js b/packages/list-box/src/vaadin-list-box.js
index 0a8822b6750..565950d39df 100644
--- a/packages/list-box/src/vaadin-list-box.js
+++ b/packages/list-box/src/vaadin-list-box.js
@@ -92,6 +92,7 @@ class ListBox extends ElementMixin(MultiSelectListMixin(ThemableMixin(Controller
     this.focused;
   }
 
+  /** @protected */
   ready() {
     super.ready();
     this.setAttribute('role', 'list');
diff --git a/packages/message-list/src/vaadin-message-list.js b/packages/message-list/src/vaadin-message-list.js
index 4112b51e61f..c39a9c0db23 100644
--- a/packages/message-list/src/vaadin-message-list.js
+++ b/packages/message-list/src/vaadin-message-list.js
@@ -101,6 +101,7 @@ class MessageList extends ElementMixin(ThemableMixin(PolymerElement)) {
     `;
   }
 
+  /** @protected */
   ready() {
     super.ready();
 
diff --git a/packages/tabs/src/vaadin-tabs.js b/packages/tabs/src/vaadin-tabs.js
index d822f5f8613..45d427d7bb3 100644
--- a/packages/tabs/src/vaadin-tabs.js
+++ b/packages/tabs/src/vaadin-tabs.js
@@ -178,6 +178,7 @@ class Tabs extends ResizeMixin(ElementMixin(ListMixin(ThemableMixin(PolymerEleme
     });
   }
 
+  /** @protected */
   ready() {
     super.ready();
     this._scrollerElement.addEventListener('scroll', () => this._updateOverflow());