diff --git a/extensions/example-extension/page.tsx b/extensions/example-extension/page.tsx
index a49faa4c39..3d98f106c6 100644
--- a/extensions/example-extension/page.tsx
+++ b/extensions/example-extension/page.tsx
@@ -1,43 +1,61 @@
-import { Component, LensRendererExtension, Navigation } from "@k8slens/extensions";
+import { Component, Interface, K8sApi, LensRendererExtension } from "@k8slens/extensions";
 import React from "react";
-import path from "path";
 import { observer } from "mobx-react";
 import { CoffeeDoodle } from "react-open-doodles";
 
-export const exampleId = Navigation.createPageParam({
-  name: "exampleId",
-  defaultValue: "demo",
-});
-
-export function ExampleIcon(props: Component.IconProps) {
-  return <Component.Icon {...props} material="pages" tooltip={path.basename(__filename)}/>;
+export interface ExamplePageProps extends Interface.PageComponentProps<ExamplePageParams> {
+  extension: LensRendererExtension; // provided in "./renderer.tsx"
 }
 
+export interface ExamplePageParams {
+  exampleId: string;
+  selectedNamespaces: K8sApi.Namespace[];
+}
+
+export const namespaceStore = K8sApi.apiManager.getStore<K8sApi.NamespaceStore>(K8sApi.namespacesApi);
+
 @observer
-export class ExamplePage extends React.Component<{ extension: LensRendererExtension }> {
+export class ExamplePage extends React.Component<ExamplePageProps> {
+  async componentDidMount() {
+    await namespaceStore.loadAll();
+  }
+
   deactivate = () => {
     const { extension } = this.props;
 
     extension.disable();
   };
 
+  renderSelectedNamespaces() {
+    const { selectedNamespaces } = this.props.params;
+
+    return (
+      <div className="flex gaps inline">
+        {selectedNamespaces.get().map(ns => {
+          const name = ns.getName();
+
+          return <Component.Badge key={name} label={name} tooltip={`Created: ${ns.getAge()}`}/>;
+        })}
+      </div>
+    );
+  }
+
   render() {
-    const exampleName = exampleId.get();
-    const doodleStyle = {
-      width: "200px"
-    };
+    const { exampleId } = this.props.params;
 
     return (
       <div className="flex column gaps align-flex-start" style={{ padding: 24 }}>
-        <div style={doodleStyle}><CoffeeDoodle accent="#3d90ce"/></div>
+        <div style={{ width: 200 }}>
+          <CoffeeDoodle accent="#3d90ce"/>
+        </div>
 
-        <p>Hello from Example extension!</p>
-        <p>File: <i>{__filename}</i></p>
-        <p>Location: <i>{location.href}</i></p>
+        <div>Hello from Example extension!</div>
+        <div>Location: <i>{location.href}</i></div>
+        <div>Namespaces: {this.renderSelectedNamespaces()}</div>
 
         <p className="url-params-demo flex column gaps">
           <a onClick={() => exampleId.set("secret")}>Show secret button</a>
-          {exampleName === "secret" && (
+          {exampleId.get() === "secret" && (
             <Component.Button accent label="Deactivate" onClick={this.deactivate}/>
           )}
         </p>
diff --git a/extensions/example-extension/renderer.tsx b/extensions/example-extension/renderer.tsx
index 78fb369f6f..97cda5cc62 100644
--- a/extensions/example-extension/renderer.tsx
+++ b/extensions/example-extension/renderer.tsx
@@ -1,47 +1,45 @@
-import { LensRendererExtension } from "@k8slens/extensions";
-import { ExampleIcon, ExamplePage } from "./page";
+import { Component, Interface, K8sApi, LensRendererExtension } from "@k8slens/extensions";
+import { ExamplePage, ExamplePageParams, namespaceStore } from "./page";
 import React from "react";
+import path from "path";
 
 export default class ExampleExtension extends LensRendererExtension {
-  clusterPages = [
+  clusterPages: Interface.PageRegistration[] = [
     {
-      id: "example",
-      title: "Example Extension",
       components: {
-        Page: () => <ExamplePage extension={this}/>,
+        Page: (props: Interface.PageComponentProps<ExamplePageParams>) => {
+          return <ExamplePage {...props} extension={this}/>;
+        },
       },
       params: {
-        // setup param "exampleId" with default value "demo"
-        // could be also {[paramName: string]: UrlParam} for advanced use-cases (custom parse/stringify)
-        exampleId: "demo"
+        // setup basic param "exampleId" with default value "demo"
+        exampleId: "demo",
+
+        // setup advanced multi-values param "selectedNamespaces" with custom parsing/stringification
+        selectedNamespaces: {
+          defaultValueStringified: ["default", "kube-system"],
+          multiValues: true,
+          parse(values: string[]) { // from URL
+            return values.map(name => namespaceStore.getByName(name)).filter(Boolean);
+          },
+          stringify(values: K8sApi.Namespace[]) { // to URL
+            return values.map(namespace => namespace.getName());
+          },
+        }
       }
     }
   ];
 
-  clusterPageMenus = [
+  clusterPageMenus: Interface.PageMenuRegistration[] = [
     {
       title: "Example extension",
       components: {
         Icon: ExampleIcon,
       },
-      target: {
-        pageId: "example",
-        params: {
-          exampleId: "demo-sample-2"
-        },
-      },
-    },
-    {
-      title: "Example secret page",
-      components: {
-        Icon: ExampleIcon,
-      },
-      target: {
-        pageId: "example",
-        params: {
-          exampleId: "secret"
-        },
-      },
     },
   ];
 }
+
+export function ExampleIcon(props: Component.IconProps) {
+  return <Component.Icon {...props} material="pages" tooltip={path.basename(__filename)}/>;
+}
diff --git a/src/extensions/interfaces/registrations.ts b/src/extensions/interfaces/registrations.ts
index a2ebb10290..aea788233a 100644
--- a/src/extensions/interfaces/registrations.ts
+++ b/src/extensions/interfaces/registrations.ts
@@ -3,6 +3,6 @@ export type { ClusterFeatureRegistration, ClusterFeatureComponents } from "../re
 export type { KubeObjectDetailRegistration, KubeObjectDetailComponents } from "../registries/kube-object-detail-registry";
 export type { KubeObjectMenuRegistration, KubeObjectMenuComponents } from "../registries/kube-object-menu-registry";
 export type { KubeObjectStatusRegistration } from "../registries/kube-object-status-registry";
-export type { PageRegistration, PageComponents } from "../registries/page-registry";
+export type { PageRegistration, RegisteredPage, PageParams, PageComponentProps, PageComponents, PageTarget } from "../registries/page-registry";
 export type { PageMenuRegistration, PageMenuComponents } from "../registries/page-menu-registry";
 export type { StatusBarRegistration } from "../registries/status-bar-registry";
\ No newline at end of file
diff --git a/src/extensions/registries/__tests__/page-registry.test.ts b/src/extensions/registries/__tests__/page-registry.test.ts
index 6f0d333681..55ba3d6d64 100644
--- a/src/extensions/registries/__tests__/page-registry.test.ts
+++ b/src/extensions/registries/__tests__/page-registry.test.ts
@@ -1,4 +1,4 @@
-import { getExtensionPageUrl, globalPageRegistry, PageTargetParams } from "../page-registry";
+import { getExtensionPageUrl, globalPageRegistry, PageParams } from "../page-registry";
 import { LensExtension } from "../../lens-extension";
 import React from "react";
 
@@ -50,7 +50,7 @@ describe("getPageUrl", () => {
   });
 
   it("gets page url with custom params", () => {
-    const params: PageTargetParams<string> = { test1: "one", test2: "2" };
+    const params: PageParams<string> = { test1: "one", test2: "2" };
     const searchParams = new URLSearchParams(params);
     const pageUrl = getExtensionPageUrl({ extensionId: ext.name, pageId: "page-with-params", params });
 
diff --git a/src/extensions/registries/base-registry.ts b/src/extensions/registries/base-registry.ts
index a85c31d4bb..052a483cbd 100644
--- a/src/extensions/registries/base-registry.ts
+++ b/src/extensions/registries/base-registry.ts
@@ -2,27 +2,33 @@
 import { action, observable } from "mobx";
 import { LensExtension } from "../lens-extension";
 
-export class BaseRegistry<T> {
-  private items = observable<T>([], { deep: false });
+export class BaseRegistry<T, I = T> {
+  private items = observable.map<T, I>();
 
-  getItems(): T[] {
-    return this.items.toJS();
+  getItems(): I[] {
+    return Array.from(this.items.values());
   }
 
-  add(items: T | T[], ext?: LensExtension): () => void; // allow method overloading with required "ext"
   @action
-  add(items: T | T[]) {
+  add(items: T | T[], extension?: LensExtension) {
     const itemArray = [items].flat() as T[];
 
-    this.items.push(...itemArray);
+    itemArray.forEach(item => {
+      this.items.set(item, this.getRegisteredItem(item, extension));
+    });
 
     return () => this.remove(...itemArray);
   }
 
+  // eslint-disable-next-line unused-imports/no-unused-vars-ts
+  protected getRegisteredItem(item: T, extension?: LensExtension): I {
+    return item as any;
+  }
+
   @action
   remove(...items: T[]) {
     items.forEach(item => {
-      this.items.remove(item); // works because of {deep: false};
+      this.items.delete(item);
     });
   }
 }
diff --git a/src/extensions/registries/page-menu-registry.ts b/src/extensions/registries/page-menu-registry.ts
index 17ff094670..8fe5b68b3b 100644
--- a/src/extensions/registries/page-menu-registry.ts
+++ b/src/extensions/registries/page-menu-registry.ts
@@ -21,7 +21,7 @@ export interface PageMenuComponents {
   Icon: React.ComponentType<IconProps>;
 }
 
-export class PageMenuRegistry<T extends PageMenuRegistration = any> extends BaseRegistry<T> {
+export class PageMenuRegistry<T extends PageMenuRegistration> extends BaseRegistry<T> {
   @action
   add(items: T[], ext: LensExtension) {
     const normalizedItems = items.map(menuItem => {
diff --git a/src/extensions/registries/page-registry.ts b/src/extensions/registries/page-registry.ts
index f3ae87f92b..344b196cd6 100644
--- a/src/extensions/registries/page-registry.ts
+++ b/src/extensions/registries/page-registry.ts
@@ -1,43 +1,51 @@
 // Extensions-api -> Custom page registration
-import type React from "react";
-import { action } from "mobx";
+
+import React from "react";
+import { observer } from "mobx-react";
 import { BaseRegistry } from "./base-registry";
 import { LensExtension, sanitizeExtensionName } from "../lens-extension";
-import { PageParam } from "../../renderer/navigation/page-param";
-import logger from "../../main/logger";
+import { isPageParamInit, PageParam, PageParamInit } from "../../renderer/navigation/page-param";
+import { createPageParam } from "../../renderer/navigation/helpers";
 
 export interface PageRegistration {
   /**
-   * Page-id, part of of extension's page url, must be unique within same extension
+   * Page ID, part of extension's page url, must be unique within same extension
    * When not provided, first registered page without "id" would be used for page-menus without target.pageId for same extension
    */
   id?: string;
+  params?: PageParams<string | ExtensionPageParamInit>;
   components: PageComponents;
-  /**
-   * Registered page params.
-   * Used to generate final page url when provided in getExtensionPageUrl()-helper.
-   * Advanced usage: provide `UrlParam` as values to customize parsing/stringification from/to URL.
-   */
-  params?: PageTargetParams<string | PageParam>;
 }
 
+// exclude "name" field since provided as key in page.params
+export type ExtensionPageParamInit = Omit<PageParamInit, "name" | "isSystem">;
+
 export interface PageComponents {
   Page: React.ComponentType<any>;
 }
 
-export interface PageTarget<P = PageTargetParams> {
+export interface PageTarget<P = PageParams> {
   extensionId?: string;
   pageId?: string;
   params?: P;
 }
 
-export interface PageTargetParams<V = any> {
+export interface PageParams<V = any> {
   [paramName: string]: V;
 }
 
-export interface RegisteredPage extends PageRegistration {
+export interface PageComponentProps<P extends PageParams = {}> {
+  params?: {
+    [N in keyof P]: PageParam<P[N]>;
+  }
+}
+
+export interface RegisteredPage {
+  id: string;
   extensionId: string;
   url: string; // registered extension's page URL (without page params)
+  params: PageParams<PageParam>; // normalized params
+  components: PageComponents; // normalized components
 }
 
 export function getExtensionPageUrl(target: PageTarget): string {
@@ -54,16 +62,11 @@ export function getExtensionPageUrl(target: PageTarget): string {
 
   if (registeredPage?.params) {
     Object.entries(registeredPage.params).forEach(([name, param]) => {
-      const targetParamValue = targetParams[name];
-
-      if (param instanceof PageParam) {
-        pageUrl.searchParams.set(name, param.stringify(targetParamValue));
+      const paramValue = param.stringify(targetParams[name]);
+      if (param.init.skipEmpty && param.isEmpty(paramValue)) {
+        pageUrl.searchParams.delete(name);
       } else {
-        const value = String(targetParamValue ?? param);
-
-        if (value) {
-          pageUrl.searchParams.set(name, value);
-        }
+        pageUrl.searchParams.set(name, paramValue);
       }
     });
   }
@@ -71,31 +74,41 @@ export function getExtensionPageUrl(target: PageTarget): string {
   return pageUrl.href.replace(pageUrl.origin, "");
 }
 
-export class PageRegistry extends BaseRegistry<RegisteredPage> {
-  @action
-  add(pages: PageRegistration | PageRegistration[], extension: LensExtension) {
-    try {
-      const items = [pages].flat().map(page => this.registerPage(page, extension));
+export class PageRegistry extends BaseRegistry<PageRegistration, RegisteredPage> {
+  protected getRegisteredItem(page: PageRegistration, ext: LensExtension): RegisteredPage {
+    const { id: pageId } = page;
+    const extensionId = ext.name;
+    const params = this.normalizeParams(page.params);
+    const components = this.normalizeComponents(page.components, params);
+    const url = getExtensionPageUrl({ extensionId, pageId });
 
-      return super.add(items);
-    } catch (error) {
-      return Function; // no-op
-    }
+    return {
+      id: pageId, extensionId, params, components, url,
+    };
   }
 
-  registerPage(page: PageRegistration, ext: LensExtension): RegisteredPage {
-    try {
-      const { id: pageId } = page;
-      const extensionId = ext.name;
+  protected normalizeComponents(components: PageComponents, params?: PageParams<PageParam>): PageComponents {
+    if (params) {
+      const { Page } = components;
 
-      return {
-        ...page,
-        extensionId,
-        url: getExtensionPageUrl({ extensionId, pageId }),
-      };
-    } catch (error) {
-      logger.error(`Failed to register page: ${error}`, { error });
+      components.Page = observer((props: object) => React.createElement(Page, { params, ...props }));
     }
+
+    return components;
+  }
+
+  protected normalizeParams(params?: PageParams<string | ExtensionPageParamInit>): PageParams<PageParam> {
+    if (!params) {
+      return;
+    }
+    Object.entries(params).forEach(([name, value]) => {
+      const paramInit: PageParamInit = isPageParamInit(value) ? value : { name, defaultValue: value };
+
+      paramInit.name ??= name;
+      params[name] = createPageParam(paramInit);
+    });
+
+    return params as PageParams<PageParam>;
   }
 
   getByPageTarget(target: PageTarget): RegisteredPage | null {
diff --git a/src/extensions/renderer-api/navigation.ts b/src/extensions/renderer-api/navigation.ts
index 2e08eb48c1..6e953920e1 100644
--- a/src/extensions/renderer-api/navigation.ts
+++ b/src/extensions/renderer-api/navigation.ts
@@ -1,4 +1,4 @@
-export { PageParam, PageParamInit } from "../../renderer/navigation/page-param";
-export { navigate, isActiveRoute, createPageParam } from "../../renderer/navigation";
+export { PageParamInit, PageParam } from "../../renderer/navigation/page-param";
+export { navigate, isActiveRoute, createPageParam } from "../../renderer/navigation/helpers";
 export { hideDetails, showDetails, getDetailsUrl } from "../../renderer/components/kube-object/kube-object-details";
 export { IURLParams } from "../../common/utils/buildUrl";
diff --git a/src/renderer/api/api-manager.ts b/src/renderer/api/api-manager.ts
index 68d4773540..030467f653 100644
--- a/src/renderer/api/api-manager.ts
+++ b/src/renderer/api/api-manager.ts
@@ -46,8 +46,8 @@ export class ApiManager {
     });
   }
 
-  getStore(api: string | KubeApi): KubeObjectStore {
-    return this.stores.get(this.resolveApi(api));
+  getStore<S extends KubeObjectStore>(api: string | KubeApi): S {
+    return this.stores.get(this.resolveApi(api)) as S;
   }
 }
 
diff --git a/src/renderer/navigation/events.ts b/src/renderer/navigation/events.ts
new file mode 100644
index 0000000000..971465706d
--- /dev/null
+++ b/src/renderer/navigation/events.ts
@@ -0,0 +1,31 @@
+import { ipcRenderer } from "electron";
+import { reaction } from "mobx";
+import { getMatchedClusterId, navigate } from "./helpers";
+import { broadcastMessage, subscribeToBroadcast } from "../../common/ipc";
+import logger from "../../main/logger";
+
+export function bindEvents() {
+  if (!ipcRenderer) {
+    return;
+  }
+
+  if (process.isMainFrame) {
+    // Keep track of active cluster-id for handling IPC/menus/etc.
+    reaction(() => getMatchedClusterId(), clusterId => {
+      broadcastMessage("cluster-view:current-id", clusterId);
+    }, {
+      fireImmediately: true
+    });
+  }
+
+  // Handle navigation via IPC (e.g. from top menu)
+  subscribeToBroadcast("renderer:navigate", (event, url: string) => {
+    logger.info(`[IPC]: ${event.type} ${JSON.stringify(url)}`, event);
+    navigate(url);
+  });
+
+  // Reload dashboard window
+  subscribeToBroadcast("renderer:reload", () => {
+    location.reload();
+  });
+}
\ No newline at end of file
diff --git a/src/renderer/navigation/helpers.ts b/src/renderer/navigation/helpers.ts
new file mode 100644
index 0000000000..33ff1dd416
--- /dev/null
+++ b/src/renderer/navigation/helpers.ts
@@ -0,0 +1,36 @@
+import type { LocationDescriptor } from "history";
+import { matchPath, RouteProps } from "react-router";
+import { PageParam, PageParamInit } from "./page-param";
+import { clusterViewRoute, IClusterViewRouteParams } from "../components/cluster-manager/cluster-view.route";
+import { navigation } from "./history";
+
+export function navigate(location: LocationDescriptor) {
+  const currentLocation = navigation.getPath();
+
+  navigation.push(location);
+
+  if (currentLocation === navigation.getPath()) {
+    navigation.goBack(); // prevent sequences of same url in history
+  }
+}
+
+export function createPageParam<V = string>(init: PageParamInit<V>) {
+  return new PageParam<V>(init, navigation);
+}
+
+export function matchRoute<P>(route: string | string[] | RouteProps) {
+  return matchPath<P>(navigation.location.pathname, route);
+}
+
+export function isActiveRoute(route: string | string[] | RouteProps): boolean {
+  return !!matchRoute(route);
+}
+
+export function getMatchedClusterId(): string {
+  const matched = matchPath<IClusterViewRouteParams>(navigation.location.pathname, {
+    exact: true,
+    path: clusterViewRoute.path
+  });
+
+  return matched?.params.clusterId;
+}
\ No newline at end of file
diff --git a/src/renderer/navigation/history.ts b/src/renderer/navigation/history.ts
new file mode 100644
index 0000000000..522cb86b21
--- /dev/null
+++ b/src/renderer/navigation/history.ts
@@ -0,0 +1,6 @@
+import { ipcRenderer } from "electron";
+import { createBrowserHistory, createMemoryHistory } from "history";
+import { createObservableHistory } from "mobx-observable-history";
+
+export const history = ipcRenderer ? createBrowserHistory() : createMemoryHistory();
+export const navigation = createObservableHistory(history);
diff --git a/src/renderer/navigation/index.ts b/src/renderer/navigation/index.ts
index 8e4bee117d..70959c2dbd 100644
--- a/src/renderer/navigation/index.ts
+++ b/src/renderer/navigation/index.ts
@@ -1,70 +1,8 @@
-// Navigation helpers
+// Navigation (renderer)
 
-import { ipcRenderer } from "electron";
-import { reaction } from "mobx";
-import { matchPath, RouteProps } from "react-router";
-import { createObservableHistory } from "mobx-observable-history";
-import { createBrowserHistory, createMemoryHistory, LocationDescriptor } from "history";
-import { broadcastMessage, subscribeToBroadcast } from "../../common/ipc";
-import { PageParam, PageParamInit } from "./page-param";
-import { clusterViewRoute, IClusterViewRouteParams } from "../components/cluster-manager/cluster-view.route";
-import logger from "../../main/logger";
+import { bindEvents } from "./events";
 
-export let history = ipcRenderer ? createBrowserHistory() : createMemoryHistory();
-export let navigation = createObservableHistory(history);
+export * from "./history";
+export * from "./helpers";
 
-export function navigate(location: LocationDescriptor) {
-  const currentLocation = navigation.getPath();
-
-  navigation.push(location);
-
-  if (currentLocation === navigation.getPath()) {
-    navigation.goBack(); // prevent sequences of same url in history
-  }
-}
-
-export function matchParams<P>(route: string | string[] | RouteProps) {
-  return matchPath<P>(navigation.location.pathname, route);
-}
-
-export function isActiveRoute(route: string | string[] | RouteProps): boolean {
-  return !!matchParams(route);
-}
-
-export function getMatchedClusterId(): string {
-  const matched = matchPath<IClusterViewRouteParams>(navigation.location.pathname, {
-    exact: true,
-    path: clusterViewRoute.path
-  });
-
-  return matched?.params.clusterId;
-}
-
-export function createPageParam<V = string>(init: PageParamInit<V>) {
-  return new PageParam<V>(init, navigation);
-}
-
-if (ipcRenderer) {
-  history = createBrowserHistory();
-  navigation = createObservableHistory(history);
-
-  if (process.isMainFrame) {
-    // Keep track of active cluster-id for handling IPC/menus/etc.
-    reaction(() => getMatchedClusterId(), clusterId => {
-      broadcastMessage("cluster-view:current-id", clusterId);
-    }, {
-      fireImmediately: true
-    });
-  }
-
-  // Handle navigation via IPC (e.g. from top menu)
-  subscribeToBroadcast("renderer:navigate", (event, url: string) => {
-    logger.info(`[IPC]: ${event.type} ${JSON.stringify(url)}`, event);
-    navigate(url);
-  });
-
-  // Reload dashboard window
-  subscribeToBroadcast("renderer:reload", () => {
-    location.reload();
-  });
-}
+bindEvents();
\ No newline at end of file
diff --git a/src/renderer/navigation/page-param.ts b/src/renderer/navigation/page-param.ts
index 0577116294..5ab31f2d73 100644
--- a/src/renderer/navigation/page-param.ts
+++ b/src/renderer/navigation/page-param.ts
@@ -1,24 +1,25 @@
-// Manage observable URL-param via location.search
+// Manage observable URL-param from document.location.search
 import { IObservableHistory } from "mobx-observable-history";
 
 export interface PageParamInit<V = any> {
   name: string;
   isSystem?: boolean;
   defaultValue?: V;
+  defaultValueStringified?: string | string[]; // serialized version of "defaultValue"
   multiValues?: boolean; // false == by default
   multiValueSep?: string; // joining multiple values with separator, default: ","
   skipEmpty?: boolean; // skip empty value(s), e.g. "?param=", default: true
-  parse?(values: string[]): V; // deserialize from URL
-  stringify?(values: V): string | string[]; // serialize params to URL
+  parse?(value: string[]): V; // deserialize from URL
+  stringify?(value: V): string | string[]; // serialize params to URL
 }
 
-export class PageParam<V = any | any[]> {
+export class PageParam<V = any> {
   static SYSTEM_PREFIX = "lens-";
 
   readonly name: string;
   protected urlName: string;
 
-  constructor(private init: PageParamInit<V>, private history: IObservableHistory) {
+  constructor(readonly init: PageParamInit<V>, protected history: IObservableHistory) {
     const { isSystem, name, skipEmpty = true } = init;
 
     this.name = name;
@@ -28,7 +29,7 @@ export class PageParam<V = any | any[]> {
     this.urlName = `${isSystem ? PageParam.SYSTEM_PREFIX : ""}${name}`;
   }
 
-  isEmpty(value: V) {
+  isEmpty(value: V | any) {
     return [value].flat().every(value => value == "" || value == null);
   }
 
@@ -59,12 +60,10 @@ export class PageParam<V = any | any[]> {
   }
 
   get(): V {
-    const { history, urlName } = this;
-    const { multiValueSep, defaultValue, skipEmpty } = this.init;
-    const value = this.parse(history.searchParams.getAsArray(urlName, multiValueSep));
+    const value = this.parse(this.getRaw());
 
-    if (skipEmpty && this.isEmpty(value)) {
-      return defaultValue;
+    if (this.init.skipEmpty && this.isEmpty(value)) {
+      return this.getDefaultValue();
     }
 
     return value;
@@ -76,12 +75,29 @@ export class PageParam<V = any | any[]> {
     this.history.merge({ search }, replaceHistory);
   }
 
-  getDefaultValue(){
-    return this.init.defaultValue;
+  setRaw(value: string | string[]) {
+    const { history, urlName } = this;
+    const { multiValues, multiValueSep, skipEmpty } = this.init;
+    const paramValue = multiValues ? [value].flat().join(multiValueSep) : String(value);
+
+    if (skipEmpty && this.isEmpty(paramValue)) {
+      history.searchParams.delete(urlName);
+    } else {
+      history.searchParams.set(urlName, paramValue);
+    }
   }
 
-  isDefault() {
-    return this.get() === this.getDefaultValue();
+  getRaw(): string[] {
+    const { history, urlName } = this;
+    const { multiValueSep } = this.init;
+
+    return history.searchParams.getAsArray(urlName, multiValueSep);
+  }
+
+  getDefaultValue() {
+    const { defaultValue, defaultValueStringified } = this.init;
+
+    return defaultValueStringified ? this.parse([defaultValueStringified].flat()) : defaultValue;
   }
 
   clear() {
@@ -113,3 +129,12 @@ export class PageParam<V = any | any[]> {
     };
   }
 }
+
+export function isPageParamInit(paramInit: PageParamInit | any = {}): paramInit is PageParamInit {
+  const init: PageParamInit = paramInit;
+
+  return [
+    init.defaultValue !== undefined || init.defaultValueStringified !== undefined,
+    typeof init.parse === "function" && typeof init.stringify === "function",
+  ].some(Boolean);
+}