diff --git a/packages/dockview-core/src/dockview/options.ts b/packages/dockview-core/src/dockview/options.ts
index f9d2cc1c5..e2aa50306 100644
--- a/packages/dockview-core/src/dockview/options.ts
+++ b/packages/dockview-core/src/dockview/options.ts
@@ -15,7 +15,10 @@ import { PanelTransfer } from '../dnd/dataTransfer';
 import { IDisposable } from '../lifecycle';
 import { Position } from '../dnd/droptarget';
 import { IDockviewPanel } from './dockviewPanel';
-import { FrameworkFactory } from '../panel/componentFactory';
+import {
+    ComponentConstructor,
+    FrameworkFactory,
+} from '../panel/componentFactory';
 import { DockviewGroupPanelApi } from '../api/dockviewGroupPanelApi';
 
 export interface IHeaderActionsRenderer extends IDisposable {
@@ -40,14 +43,10 @@ export interface TabContextMenuEvent {
 
 export interface DockviewRenderFunctions {
     tabComponents?: {
-        [componentName: string]: {
-            new (id: string, component: string): ITabRenderer;
-        };
+        [componentName: string]: ComponentConstructor<ITabRenderer>;
     };
     components?: {
-        [componentName: string]: {
-            new (id: string, component: string): IContentRenderer;
-        };
+        [componentName: string]: ComponentConstructor<IContentRenderer>;
     };
     frameworkTabComponents?: {
         [componentName: string]: any;
diff --git a/packages/dockview-core/src/gridview/options.ts b/packages/dockview-core/src/gridview/options.ts
index 461ab6c66..3325befa4 100644
--- a/packages/dockview-core/src/gridview/options.ts
+++ b/packages/dockview-core/src/gridview/options.ts
@@ -1,14 +1,15 @@
 import { GridviewPanel } from './gridviewPanel';
 import { ISplitviewStyles, Orientation } from '../splitview/splitview';
-import { FrameworkFactory } from '../panel/componentFactory';
+import {
+    ComponentConstructor,
+    FrameworkFactory,
+} from '../panel/componentFactory';
 
 export interface GridviewComponentOptions {
     proportionalLayout: boolean;
     orientation: Orientation;
     components?: {
-        [componentName: string]: {
-            new (id: string, componentName: string): GridviewPanel;
-        };
+        [componentName: string]: ComponentConstructor<GridviewPanel>;
     };
     frameworkComponents?: {
         [componentName: string]: any;
diff --git a/packages/dockview-core/src/panel/componentFactory.ts b/packages/dockview-core/src/panel/componentFactory.ts
index d88fb64ad..fb77f9944 100644
--- a/packages/dockview-core/src/panel/componentFactory.ts
+++ b/packages/dockview-core/src/panel/componentFactory.ts
@@ -2,11 +2,15 @@ export interface FrameworkFactory<T> {
     createComponent: (id: string, componentId: string, component: any) => T;
 }
 
+export type ComponentConstructor<T> = {
+    new (id: string, component: string): T;
+};
+
 export function createComponent<T>(
     id: string,
     componentName?: string,
     components: {
-        [componentName: string]: { new (id: string, component: string): T };
+        [componentName: string]: ComponentConstructor<T>;
     } = {},
     frameworkComponents: {
         [componentName: string]: any;
diff --git a/packages/dockview-core/src/paneview/options.ts b/packages/dockview-core/src/paneview/options.ts
index 00763e652..e4ff5d055 100644
--- a/packages/dockview-core/src/paneview/options.ts
+++ b/packages/dockview-core/src/paneview/options.ts
@@ -1,20 +1,19 @@
-import { FrameworkFactory } from '../panel/componentFactory';
+import {
+    ComponentConstructor,
+    FrameworkFactory,
+} from '../panel/componentFactory';
 import { PaneviewDndOverlayEvent } from './paneviewComponent';
 import { IPaneBodyPart, IPaneHeaderPart, PaneviewPanel } from './paneviewPanel';
 
 export interface PaneviewComponentOptions {
     components?: {
-        [componentName: string]: {
-            new (id: string, componentName: string): PaneviewPanel;
-        };
+        [componentName: string]: ComponentConstructor<PaneviewPanel>;
     };
     frameworkComponents?: {
         [componentName: string]: any;
     };
     headerComponents?: {
-        [componentName: string]: {
-            new (id: string, componentName: string): PaneviewPanel;
-        };
+        [componentName: string]: ComponentConstructor<PaneviewPanel>;
     };
     headerframeworkComponents?: {
         [componentName: string]: any;
diff --git a/packages/dockview-core/src/paneview/paneview.ts b/packages/dockview-core/src/paneview/paneview.ts
index 65666bdb7..3bebc07f5 100644
--- a/packages/dockview-core/src/paneview/paneview.ts
+++ b/packages/dockview-core/src/paneview/paneview.ts
@@ -19,7 +19,7 @@ export class Paneview extends CompositeDisposable implements IDisposable {
     private splitview: Splitview;
     private paneItems: PaneItem[] = [];
     private _orientation: Orientation;
-    private animationTimer: any | undefined;
+    private animationTimer: any;
     private skipAnimation = false;
 
     private readonly _onDidChange = new Emitter<void>();
diff --git a/packages/dockview-core/src/paneview/paneviewPanel.ts b/packages/dockview-core/src/paneview/paneviewPanel.ts
index bfbda79c8..ba0f4a315 100644
--- a/packages/dockview-core/src/paneview/paneviewPanel.ts
+++ b/packages/dockview-core/src/paneview/paneviewPanel.ts
@@ -87,7 +87,7 @@ export abstract class PaneviewPanel
     private bodyPart?: IPaneHeaderPart;
     private headerPart?: IPaneBodyPart;
     private expandedSize = 0;
-    private animationTimer: any | undefined;
+    private animationTimer: any;
     private _orientation: Orientation;
 
     private _headerVisible: boolean;
diff --git a/packages/dockview-core/src/splitview/options.ts b/packages/dockview-core/src/splitview/options.ts
index 7f180cd0a..caa4ee0a4 100644
--- a/packages/dockview-core/src/splitview/options.ts
+++ b/packages/dockview-core/src/splitview/options.ts
@@ -2,7 +2,10 @@ import { IPanel, PanelInitParameters } from '../panel/types';
 import { IView, SplitViewOptions, LayoutPriority } from './splitview';
 import { SplitviewPanel } from './splitviewPanel';
 import { SplitviewComponent } from './splitviewComponent';
-import { FrameworkFactory } from '../panel/componentFactory';
+import {
+    ComponentConstructor,
+    FrameworkFactory,
+} from '../panel/componentFactory';
 
 export interface PanelViewInitParameters extends PanelInitParameters {
     minimumSize?: number;
@@ -18,9 +21,7 @@ export interface ISerializableView extends IView, IPanel {
 
 export interface SplitviewComponentOptions extends SplitViewOptions {
     components?: {
-        [componentName: string]: {
-            new (id: string, componentName: string): SplitviewPanel;
-        };
+        [componentName: string]: ComponentConstructor<SplitviewPanel>;
     };
     frameworkComponents?: {
         [componentName: string]: any;
diff --git a/packages/dockview-core/src/splitview/splitviewComponent.ts b/packages/dockview-core/src/splitview/splitviewComponent.ts
index 824cfa0a4..b38971cb4 100644
--- a/packages/dockview-core/src/splitview/splitviewComponent.ts
+++ b/packages/dockview-core/src/splitview/splitviewComponent.ts
@@ -274,7 +274,7 @@ export class SplitviewComponent
         view.orientation = this.splitview.orientation;
 
         view.init({
-            params: options.params || {},
+            params: options.params ?? {},
             minimumSize: options.minimumSize,
             maximumSize: options.maximumSize,
             snap: options.snap,
diff --git a/packages/dockview/src/react.ts b/packages/dockview/src/react.ts
index 59299f22e..378112165 100644
--- a/packages/dockview/src/react.ts
+++ b/packages/dockview/src/react.ts
@@ -194,7 +194,7 @@ export const usePortalsLifecycle: PortalLifecycleHook = () => {
 
 // it does the job...
 export function isReactElement(
-    element: any | React.ReactElement
+    element: unknown
 ): element is React.ReactElement {
-    return element?.type;
+    return !!(element as React.ReactElement)?.type;
 }