feat: Popup component

src-next/utils/index.ts

@@ -4,6 +4,8 @@ export { createNamespace } from './create';
 // eslint-disable-next-line @typescript-eslint/no-empty-function
 export function noop() {}
 
+export const inBrowser = typeof window !== 'undefined'
+
 export function isDef(val: unknown): boolean {
   return val !== undefined && val !== null;
 }