diff --git a/components/lib/megamenu/BaseMegaMenu.vue b/components/lib/megamenu/BaseMegaMenu.vue
new file mode 100644
index 000000000..ffcaf69db
--- /dev/null
+++ b/components/lib/megamenu/BaseMegaMenu.vue
@@ -0,0 +1,240 @@
+<script>
+import BaseComponent from 'primevue/basecomponent';
+import { useStyle } from 'primevue/usestyle';
+
+const styles = `
+.p-megamenu {
+    display: flex;
+}
+
+.p-megamenu-root-list {
+    margin: 0;
+    padding: 0;
+    list-style: none;
+}
+
+.p-megamenu-root-list > .p-menuitem {
+    position: relative;
+}
+
+.p-megamenu .p-menuitem-link {
+    cursor: pointer;
+    display: flex;
+    align-items: center;
+    text-decoration: none;
+    overflow: hidden;
+    position: relative;
+}
+
+.p-megamenu .p-menuitem-text {
+    line-height: 1;
+}
+
+.p-megamenu-panel {
+    display: none;
+    position: absolute;
+    width: auto;
+    z-index: 1;
+}
+
+.p-megamenu-root-list > .p-menuitem-active > .p-megamenu-panel {
+    display: block;
+}
+
+.p-megamenu-submenu {
+    margin: 0;
+    padding: 0;
+    list-style: none;
+}
+
+/* Horizontal */
+.p-megamenu-horizontal {
+    align-items: center;
+}
+
+.p-megamenu-horizontal .p-megamenu-root-list {
+    display: flex;
+    align-items: center;
+    flex-wrap: wrap;
+}
+
+.p-megamenu-horizontal .p-megamenu-end {
+    margin-left: auto;
+    align-self: center;
+}
+
+/* Vertical */
+.p-megamenu-vertical {
+    flex-direction: column;
+}
+
+.p-megamenu-vertical .p-megamenu-root-list {
+    flex-direction: column;
+}
+
+.p-megamenu-vertical .p-megamenu-root-list > .p-menuitem-active > .p-megamenu-panel {
+    left: 100%;
+    top: 0;
+}
+
+.p-megamenu-vertical .p-megamenu-root-list > .p-menuitem > .p-menuitem-content > .p-menuitem-link > .p-submenu-icon {
+    margin-left: auto;
+}
+
+.p-megamenu-grid {
+    display: flex;
+}
+
+.p-megamenu-col-2,
+.p-megamenu-col-3,
+.p-megamenu-col-4,
+.p-megamenu-col-6,
+.p-megamenu-col-12 {
+    flex: 0 0 auto;
+    padding: 0.5rem;
+}
+
+.p-megamenu-col-2 {
+    width: 16.6667%;
+}
+
+.p-megamenu-col-3 {
+    width: 25%;
+}
+
+.p-megamenu-col-4 {
+    width: 33.3333%;
+}
+
+.p-megamenu-col-6 {
+    width: 50%;
+}
+
+.p-megamenu-col-12 {
+    width: 100%;
+}
+`;
+
+const inlineStyles = {
+    submenu: ({ context, processedItem }) => ({ display: context.isItemActive(processedItem) ? 'block' : 'none' })
+};
+
+const classes = {
+    root: ({ instance }) => [
+        'p-megamenu p-component',
+        {
+            'p-megamenu-horizontal': instance.horizontal,
+            'p-megamenu-vertical': instance.vertical
+        }
+    ],
+    start: 'p-megamenu-start',
+    menu: 'p-megamenu-root-list',
+    submenuHeader: ({ context, processedItem }) => [
+        'p-megamenu-submenu-header p-submenu-header',
+        {
+            'p-disabled': context.isItemDisabled(processedItem)
+        }
+    ],
+    menuitem: ({ context, processedItem }) => [
+        'p-menuitem',
+        {
+            'p-menuitem-active p-highlight': context.isItemActive(processedItem),
+            'p-focus': context.isItemFocused(processedItem),
+            'p-disabled': context.isItemDisabled(processedItem)
+        }
+    ],
+    content: 'p-menuitem-content',
+    action: ({ context, isActive, isExactActive }) => [
+        'p-menuitem-link',
+        {
+            'router-link-active': isActive,
+            'router-link-active-exact': context.exact && isExactActive
+        }
+    ],
+    icon: 'p-menuitem-icon',
+    label: 'p-menuitem-text',
+    submenuIcon: 'p-submenu-icon',
+    panel: 'p-megamenu-panel',
+    grid: 'p-megamenu-grid',
+    column: ({ context, processedItem }) => {
+        let length = context.isItemGroup(processedItem) ? processedItem.items.length : 0;
+        let columnClass;
+
+        switch (length) {
+            case 2:
+                columnClass = 'p-megamenu-col-6';
+                break;
+
+            case 3:
+                columnClass = 'p-megamenu-col-4';
+                break;
+
+            case 4:
+                columnClass = 'p-megamenu-col-3';
+                break;
+
+            case 6:
+                columnClass = 'p-megamenu-col-2';
+                break;
+
+            default:
+                columnClass = 'p-megamenu-col-12';
+                break;
+        }
+
+        return columnClass;
+    },
+    submenu: 'p-submenu-list p-megamenu-submenu',
+    separator: 'p-menuitem-separator',
+    end: 'p-megamenu-end'
+};
+
+const { load: loadStyle, unload: unloadStyle } = useStyle(styles, { id: 'primevue_megamenu_style', manual: true });
+
+export default {
+    name: 'BaseMegaMenu',
+    extends: BaseComponent,
+    props: {
+        model: {
+            type: Array,
+            default: null
+        },
+        orientation: {
+            type: String,
+            default: 'horizontal'
+        },
+        exact: {
+            type: Boolean,
+            default: true
+        },
+        disabled: {
+            type: Boolean,
+            default: false
+        },
+        tabindex: {
+            type: Number,
+            default: 0
+        },
+        'aria-labelledby': {
+            type: String,
+            default: null
+        },
+        'aria-label': {
+            type: String,
+            default: null
+        }
+    },
+    css: {
+        classes,
+        inlineStyles
+    },
+    watch: {
+        isUnstyled: {
+            immediate: true,
+            handler(newValue) {
+                !newValue && loadStyle();
+            }
+        }
+    }
+};
+</script>
diff --git a/components/lib/megamenu/MegaMenu.d.ts b/components/lib/megamenu/MegaMenu.d.ts
index d2dfe3b69..fba3a49ea 100755
--- a/components/lib/megamenu/MegaMenu.d.ts
+++ b/components/lib/megamenu/MegaMenu.d.ts
@@ -75,6 +75,10 @@ export interface MegaMenuPassThroughOptions {
      * Uses to pass attributes to the submenu header's DOM element.
      */
     submenuHeader?: MegaMenuPassThroughOptionType;
+    /**
+     * Uses to pass attributes to the submenu's DOM element.
+     */
+    submenu?: MegaMenuPassThroughOptionType;
     /**
      * Uses to pass attributes to the separator's DOM element.
      */
@@ -195,6 +199,11 @@ export interface MegaMenuProps {
      * @type {MegaMenuPassThroughOptions}
      */
     pt?: MegaMenuPassThroughOptions;
+    /**
+     * When enabled, it removes component related styles in the core.
+     * @defaultValue false
+     */
+    unstyled?: boolean;
 }
 
 /**
diff --git a/components/lib/megamenu/MegaMenu.vue b/components/lib/megamenu/MegaMenu.vue
index c9fd0fc78..bb29a446c 100755
--- a/components/lib/megamenu/MegaMenu.vue
+++ b/components/lib/megamenu/MegaMenu.vue
@@ -1,12 +1,11 @@
 <template>
-    <div :ref="containerRef" :id="id" :class="containerClass" v-bind="ptm('root')">
-        <div v-if="$slots.start" class="p-megamenu-start" v-bind="ptm('start')">
+    <div :ref="containerRef" :id="id" :class="cx('root')" v-bind="ptm('root')" data-pc-name="megamenu">
+        <div v-if="$slots.start" :class="cx('start')" v-bind="ptm('start')">
             <slot name="start"></slot>
         </div>
         <MegaMenuSub
             :ref="menubarRef"
             :id="id + '_list'"
-            class="p-megamenu-root-list"
             :tabindex="!disabled ? tabindex : -1"
             role="menubar"
             :aria-label="ariaLabel"
@@ -29,20 +28,20 @@
             @item-click="onItemClick"
             @item-mouseenter="onItemMouseEnter"
         />
-        <div v-if="$slots.end" class="p-megamenu-end" v-bind="ptm('end')">
+        <div v-if="$slots.end" :class="cx('end')" v-bind="ptm('end')">
             <slot name="end"></slot>
         </div>
     </div>
 </template>
 
 <script>
-import BaseComponent from 'primevue/basecomponent';
 import { DomHandler, ObjectUtils, UniqueComponentId } from 'primevue/utils';
+import BaseMegaMenu from './BaseMegaMenu.vue';
 import MegaMenuSub from './MegaMenuSub.vue';
 
 export default {
     name: 'MegaMenu',
-    extends: BaseComponent,
+    extends: BaseMegaMenu,
     emits: ['focus', 'blur'],
     props: {
         model: {
@@ -384,7 +383,7 @@ export default {
         onEnterKey(event) {
             if (this.focusedItemInfo.index !== -1) {
                 const element = DomHandler.findSingle(this.menubar, `li[id="${`${this.focusedItemId}`}"]`);
-                const anchorElement = element && DomHandler.findSingle(element, '.p-menuitem-link');
+                const anchorElement = element && DomHandler.findSingle(element, 'a[data-pc-section="action"]');
 
                 anchorElement ? anchorElement.click() : element && element.click();
 
@@ -580,15 +579,6 @@ export default {
         }
     },
     computed: {
-        containerClass() {
-            return [
-                'p-megamenu p-component',
-                {
-                    'p-megamenu-horizontal': this.horizontal,
-                    'p-megamenu-vertical': this.vertical
-                }
-            ];
-        },
         processedItems() {
             return this.createProcessedItems(this.model || []);
         },
@@ -622,116 +612,3 @@ export default {
     }
 };
 </script>
-
-<style>
-.p-megamenu {
-    display: flex;
-}
-
-.p-megamenu-root-list {
-    margin: 0;
-    padding: 0;
-    list-style: none;
-}
-
-.p-megamenu-root-list > .p-menuitem {
-    position: relative;
-}
-
-.p-megamenu .p-menuitem-link {
-    cursor: pointer;
-    display: flex;
-    align-items: center;
-    text-decoration: none;
-    overflow: hidden;
-    position: relative;
-}
-
-.p-megamenu .p-menuitem-text {
-    line-height: 1;
-}
-
-.p-megamenu-panel {
-    display: none;
-    position: absolute;
-    width: auto;
-    z-index: 1;
-}
-
-.p-megamenu-root-list > .p-menuitem-active > .p-megamenu-panel {
-    display: block;
-}
-
-.p-megamenu-submenu {
-    margin: 0;
-    padding: 0;
-    list-style: none;
-}
-
-/* Horizontal */
-.p-megamenu-horizontal {
-    align-items: center;
-}
-
-.p-megamenu-horizontal .p-megamenu-root-list {
-    display: flex;
-    align-items: center;
-    flex-wrap: wrap;
-}
-
-.p-megamenu-horizontal .p-megamenu-end {
-    margin-left: auto;
-    align-self: center;
-}
-
-/* Vertical */
-.p-megamenu-vertical {
-    flex-direction: column;
-}
-
-.p-megamenu-vertical .p-megamenu-root-list {
-    flex-direction: column;
-}
-
-.p-megamenu-vertical .p-megamenu-root-list > .p-menuitem-active > .p-megamenu-panel {
-    left: 100%;
-    top: 0;
-}
-
-.p-megamenu-vertical .p-megamenu-root-list > .p-menuitem > .p-menuitem-content > .p-menuitem-link > .p-submenu-icon {
-    margin-left: auto;
-}
-
-.p-megamenu-grid {
-    display: flex;
-}
-
-.p-megamenu-col-2,
-.p-megamenu-col-3,
-.p-megamenu-col-4,
-.p-megamenu-col-6,
-.p-megamenu-col-12 {
-    flex: 0 0 auto;
-    padding: 0.5rem;
-}
-
-.p-megamenu-col-2 {
-    width: 16.6667%;
-}
-
-.p-megamenu-col-3 {
-    width: 25%;
-}
-
-.p-megamenu-col-4 {
-    width: 33.3333%;
-}
-
-.p-megamenu-col-6 {
-    width: 50%;
-}
-
-.p-megamenu-col-12 {
-    width: 100%;
-}
-</style>
diff --git a/components/lib/megamenu/MegaMenuSub.vue b/components/lib/megamenu/MegaMenuSub.vue
index 2cc6f877e..21868e3e2 100644
--- a/components/lib/megamenu/MegaMenuSub.vue
+++ b/components/lib/megamenu/MegaMenuSub.vue
@@ -1,12 +1,12 @@
 <template>
-    <ul v-bind="ptm('menu')">
-        <li v-if="submenu" :class="getSubmenuHeaderClass(submenu)" :style="getItemProp(submenu, 'style')" role="presentation" v-bind="ptm('submenuHeader')">{{ getItemLabel(submenu) }}</li>
+    <ul :class="level === 0 ? getCXOptions('menu') : getCXOptions('submenu')" :tabindex="tabindex" v-bind="level === 0 ? ptm('menu') : ptm('submenu')">
+        <li v-if="submenu" :class="[getCXOptions('submenuHeader', { submenu }), getItemProp(submenu, 'class')]" :style="getItemProp(submenu, 'style')" role="presentation" v-bind="ptm('submenuHeader')">{{ getItemLabel(submenu) }}</li>
         <template v-for="(processedItem, index) of items" :key="getItemKey(processedItem)">
             <li
                 v-if="isItemVisible(processedItem) && !getItemProp(processedItem, 'separator')"
                 :id="getItemId(processedItem)"
                 :style="getItemProp(processedItem, 'style')"
-                :class="getItemClass(processedItem)"
+                :class="[getCXOptions('menuitem', { processedItem }), getItemProp(processedItem, 'class')]"
                 role="menuitem"
                 :aria-label="getItemLabel(processedItem)"
                 :aria-disabled="isItemDisabled(processedItem) || undefined"
@@ -16,46 +16,40 @@
                 :aria-setsize="getAriaSetSize()"
                 :aria-posinset="getAriaPosInset(index)"
                 v-bind="getPTOptions(processedItem, 'menuitem')"
+                :data-p-highlight="isItemActive(processedItem)"
+                :data-p-focused="isItemFocused(processedItem)"
+                :data-p-disabled="isItemDisabled(processedItem)"
             >
-                <div class="p-menuitem-content" @click="onItemClick($event, processedItem)" @mouseenter="onItemMouseEnter($event, processedItem)" v-bind="getPTOptions(processedItem, 'content')">
+                <div :class="getCXOptions('content')" @click="onItemClick($event, processedItem)" @mouseenter="onItemMouseEnter($event, processedItem)" v-bind="getPTOptions(processedItem, 'content')">
                     <template v-if="!templates.item">
                         <router-link v-if="getItemProp(processedItem, 'to') && !isItemDisabled(processedItem)" v-slot="{ navigate, href, isActive, isExactActive }" :to="getItemProp(processedItem, 'to')" custom>
-                            <a v-ripple :href="href" :class="getItemActionClass(processedItem, { isActive, isExactActive })" tabindex="-1" aria-hidden="true" @click="onItemActionClick($event, navigate)" v-bind="getPTOptions(processedItem, 'action')">
-                                <component v-if="templates.itemicon" :is="templates.itemicon" :item="processedItem.item" :class="getItemIconClass(processedItem)" />
-                                <span v-else-if="getItemProp(processedItem, 'icon')" :class="getItemIconClass(processedItem)" v-bind="getPTOptions(processedItem, 'icon')" />
-                                <span class="p-menuitem-text" v-bind="getPTOptions(processedItem, 'label')">{{ getItemLabel(processedItem) }}</span>
+                            <a v-ripple :href="href" :class="getCXOptions('action', { isActive, isExactActive })" tabindex="-1" aria-hidden="true" @click="onItemActionClick($event, navigate)" v-bind="getPTOptions(processedItem, 'action')">
+                                <component v-if="templates.itemicon" :is="templates.itemicon" :item="processedItem.item" :class="[getCXOptions('icon'), getItemProp(processedItem, 'icon')]" />
+                                <span v-else-if="getItemProp(processedItem, 'icon')" :class="[getCXOptions('icon'), getItemProp(processedItem, 'icon')]" v-bind="getPTOptions(processedItem, 'icon')" />
+                                <span :class="getCXOptions('text')" v-bind="getPTOptions(processedItem, 'label')">{{ getItemLabel(processedItem) }}</span>
                             </a>
                         </router-link>
-                        <a
-                            v-else
-                            v-ripple
-                            :href="getItemProp(processedItem, 'url')"
-                            :class="getItemActionClass(processedItem)"
-                            :target="getItemProp(processedItem, 'target')"
-                            tabindex="-1"
-                            aria-hidden="true"
-                            v-bind="getPTOptions(processedItem, 'action')"
-                        >
-                            <component v-if="templates.itemicon" :is="templates.itemicon" :item="processedItem.item" :class="getItemIconClass(processedItem)" />
-                            <span v-else-if="getItemProp(processedItem, 'icon')" :class="getItemIconClass(processedItem)" v-bind="getPTOptions(processedItem, 'icon')" />
-                            <span class="p-menuitem-text" v-bind="getPTOptions(processedItem, 'label')">{{ getItemLabel(processedItem) }}</span>
+                        <a v-else v-ripple :href="getItemProp(processedItem, 'url')" :class="getCXOptions('action')" :target="getItemProp(processedItem, 'target')" tabindex="-1" aria-hidden="true" v-bind="getPTOptions(processedItem, 'action')">
+                            <component v-if="templates.itemicon" :is="templates.itemicon" :item="processedItem.item" :class="[getCXOptions('icon'), getItemProp(processedItem, 'icon')]" />
+                            <span v-else-if="getItemProp(processedItem, 'icon')" :class="[getCXOptions('icon'), getItemProp(processedItem, 'icon')]" v-bind="getPTOptions(processedItem, 'icon')" />
+                            <span :class="getCXOptions('text')" v-bind="getPTOptions(processedItem, 'label')">{{ getItemLabel(processedItem) }}</span>
                             <template v-if="isItemGroup(processedItem)">
-                                <component v-if="templates.submenuicon" :is="templates.submenuicon" :active="isItemActive(processedItem)" class="p-submenu-icon" v-bind="getPTOptions(processedItem, 'submenuIcon')" />
-                                <component v-else :is="horizontal ? 'AngleDownIcon' : 'AngleRightIcon'" class="p-submenu-icon" v-bind="getPTOptions(processedItem, 'submenuIcon')" />
+                                <component v-if="templates.submenuicon" :is="templates.submenuicon" :active="isItemActive(processedItem)" :class="getCXOptions('submenuIcon')" v-bind="getPTOptions(processedItem, 'submenuIcon')" />
+                                <component v-else :is="horizontal ? 'AngleDownIcon' : 'AngleRightIcon'" :class="getCXOptions('submenuIcon')" v-bind="getPTOptions(processedItem, 'submenuIcon')" />
                             </template>
                         </a>
                     </template>
                     <component v-else :is="templates.item" :item="processedItem.item"></component>
                 </div>
-                <div v-if="isItemVisible(processedItem) && isItemGroup(processedItem)" class="p-megamenu-panel" v-bind="ptm('panel')">
-                    <div class="p-megamenu-grid" v-bind="ptm('grid')">
-                        <div v-for="col of processedItem.items" :key="getItemKey(col)" :class="getColumnClass(processedItem)" v-bind="ptm('column')">
+                <div v-if="isItemVisible(processedItem) && isItemGroup(processedItem)" :class="getCXOptions('panel')" v-bind="ptm('panel')">
+                    <div :class="getCXOptions('grid')" v-bind="ptm('grid')">
+                        <div v-for="col of processedItem.items" :key="getItemKey(col)" :class="getCXOptions('column', { processedItem })" v-bind="ptm('column')">
                             <MegaMenuSub
                                 v-for="submenu of col"
                                 :key="getSubListKey(submenu)"
                                 :id="getSubListId(submenu)"
+                                :style="getSXOptions('submenu', { processedItem })"
                                 role="menu"
-                                class="p-submenu-list p-megamenu-submenu"
                                 :menuId="menuId"
                                 :focusedItemId="focusedItemId"
                                 :submenu="submenu"
@@ -74,8 +68,8 @@
             <li
                 v-if="isItemVisible(processedItem) && getItemProp(processedItem, 'separator')"
                 :id="getItemId(processedItem)"
+                :class="[getCXOptions('separator'), getItemProp(processedItem, 'class')]"
                 :style="getItemProp(processedItem, 'style')"
-                :class="getSeparatorItemClass(processedItem)"
                 role="separator"
                 v-bind="ptm('separator')"
             ></li>
@@ -84,15 +78,15 @@
 </template>
 
 <script>
-import BaseComponent from 'primevue/basecomponent';
 import AngleDownIcon from 'primevue/icons/angledown';
 import AngleRightIcon from 'primevue/icons/angleright';
 import Ripple from 'primevue/ripple';
 import { ObjectUtils } from 'primevue/utils';
+import BaseMegaMenu from './BaseMegaMenu.vue';
 
 export default {
     name: 'MegaMenuSub',
-    extends: BaseComponent,
+    extends: BaseMegaMenu,
     emits: ['item-click', 'item-mouseenter'],
     props: {
         menuId: {
@@ -130,6 +124,10 @@ export default {
         exact: {
             type: Boolean,
             default: true
+        },
+        tabindex: {
+            type: Number,
+            default: 0
         }
     },
     methods: {
@@ -159,6 +157,18 @@ export default {
                 }
             });
         },
+        getCXOptions(key, params) {
+            return this.cx(key, {
+                ...params,
+                context: this
+            });
+        },
+        getSXOptions(key, params) {
+            return this.sx(key, true, {
+                ...params,
+                context: this
+            });
+        },
         isItemActive(processedItem) {
             return ObjectUtils.isNotEmpty(this.activeItem) ? this.activeItem.key === processedItem.key : false;
         },
@@ -189,69 +199,6 @@ export default {
         },
         getAriaPosInset(index) {
             return index - this.items.slice(0, index).filter((processedItem) => this.isItemVisible(processedItem) && this.getItemProp(processedItem, 'separator')).length + 1;
-        },
-        getSubmenuHeaderClass(processedItem) {
-            return [
-                'p-megamenu-submenu-header p-submenu-header',
-                this.getItemProp(processedItem, 'class'),
-                {
-                    'p-disabled': this.isItemDisabled(processedItem)
-                }
-            ];
-        },
-        getColumnClass(processedItem) {
-            let length = this.isItemGroup(processedItem) ? processedItem.items.length : 0;
-            let columnClass;
-
-            switch (length) {
-                case 2:
-                    columnClass = 'p-megamenu-col-6';
-                    break;
-
-                case 3:
-                    columnClass = 'p-megamenu-col-4';
-                    break;
-
-                case 4:
-                    columnClass = 'p-megamenu-col-3';
-                    break;
-
-                case 6:
-                    columnClass = 'p-megamenu-col-2';
-                    break;
-
-                default:
-                    columnClass = 'p-megamenu-col-12';
-                    break;
-            }
-
-            return columnClass;
-        },
-        getItemClass(processedItem) {
-            return [
-                'p-menuitem',
-                this.getItemProp(processedItem, 'class'),
-                {
-                    'p-menuitem-active p-highlight': this.isItemActive(processedItem),
-                    'p-focus': this.isItemFocused(processedItem),
-                    'p-disabled': this.isItemDisabled(processedItem)
-                }
-            ];
-        },
-        getItemActionClass(processedItem, routerProps) {
-            return [
-                'p-menuitem-link',
-                {
-                    'router-link-active': routerProps && routerProps.isActive,
-                    'router-link-active-exact': this.exact && routerProps && routerProps.isExactActive
-                }
-            ];
-        },
-        getItemIconClass(processedItem) {
-            return ['p-menuitem-icon', this.getItemProp(processedItem, 'icon')];
-        },
-        getSeparatorItemClass(processedItem) {
-            return ['p-menuitem-separator', this.getItemProp(processedItem, 'class')];
         }
     },
     components: {