refactor: add isServer to be compatible with node env

Author: John60676

src/__tests__/utils-node.test.ts

@@ -0,0 +1,11 @@
+/**
+ * @jest-environment node
+ */
+
+import { isServer } from '../core/utils';
+
+describe('utils-node-env', () => {
+  test('isServer should work', async () => {
+    expect(isServer).toBe(true);
+  });
+});

src/core/utils/index.ts

@@ -17,10 +17,12 @@ export const isFunction = (fn: unknown): fn is Function =>
 
 export const isNil = (val: unknown) => val === null || val === undefined;
 
+export const isServer = typeof window === 'undefined';
+
 export const isDocumentVisibility = () =>
-  window?.document?.visibilityState === 'visible';
+  !isServer && window?.document?.visibilityState === 'visible';
 
-export const isOnline = () => window?.navigator?.onLine ?? true;
+export const isOnline = () => (!isServer && window?.navigator?.onLine) ?? true;
 
 export const unRefObject = <T extends RefObject>(val: T) => {
   const obj = {};

src/core/utils/listener.ts

@@ -1,4 +1,4 @@
-import { isDocumentVisibility } from './index';
+import { isDocumentVisibility, isServer } from './index';
 
 type EventFunc = () => void;
 type ListenersSet = Set<EventFunc>;
@@ -40,7 +40,7 @@ const observer = (listeners: ListenersSet) => {
 };
 
 /* istanbul ignore else */
-if (window?.addEventListener) {
+if (!isServer && window?.addEventListener) {
   window.addEventListener(
     'visibilitychange',
     () => {