v0.3

.github/workflows/e2e.yml

@@ -8,13 +8,13 @@ jobs:
     timeout-minutes: 5
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
-      - uses: pnpm/action-setup@v2
+      - uses: pnpm/action-setup@v3
         with:
           version: 8
 
-      - uses: actions/setup-node@v2
+      - uses: actions/setup-node@v3
         with:
           node-version: 18.x
           cache: 'pnpm'
@@ -31,7 +31,7 @@ jobs:
 
       - name: Cache Playwright Browsers for Playwright's Version
         id: cache-playwright-browsers
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: ~/.cache/ms-playwright
           key: playwright-browsers-${{ env.PLAYWRIGHT_VERSION }}

.github/workflows/test.yml

@@ -7,15 +7,15 @@ jobs:
     name: Run Unit Tests
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
-      - uses: pnpm/action-setup@v2
+      - uses: pnpm/action-setup@v3
         with:
           version: 8
 
-      - uses: actions/setup-node@v3
+      - uses: actions/setup-node@v4
         with:
-          node-version: 18.x
+          node-version: 20.x
           cache: 'pnpm'
 
       - run: pnpm install

examples/example/package.json

@@ -7,7 +7,7 @@
     "start": "next start"
   },
   "dependencies": {
-    "next": "12.2.2",
+    "next": "^13.4.19",
     "next-themes": "workspace:*",
     "react": "18.2.0",
     "react-dom": "18.2.0"

examples/tailwind/package.json

@@ -7,7 +7,7 @@
     "start": "next start"
   },
   "dependencies": {
-    "next": "12.2.2",
+    "next": "^13.4.19",
     "next-themes": "workspace:*",
     "react": "18.2.0",
     "react-dom": "18.2.0"

examples/with-app-dir/package.json

@@ -1,24 +1,20 @@
 {
   "name": "with-app-dir",
-  "version": "0.1.0",
-  "private": true,
+  "version": "1.0.0",
   "scripts": {
     "dev": "next dev",
     "build": "next build",
-    "start": "next start",
-    "lint": "next lint"
+    "start": "next start"
   },
   "dependencies": {
-    "@types/node": "20.5.7",
-    "@types/react": "^18.2.21",
-    "@types/react-dom": "18.2.7",
-    "autoprefixer": "10.4.15",
     "next": "^13.4.19",
     "next-themes": "workspace:*",
-    "postcss": "8.4.28",
     "react": "18.2.0",
-    "react-dom": "18.2.0",
-    "tailwindcss": "3.3.3",
-    "typescript": "^5.2.2"
+    "react-dom": "18.2.0"
+  },
+  "devDependencies": {
+    "autoprefixer": "10.4.15",
+    "postcss": "8.4.28",
+    "tailwindcss": "3.3.3"
   }
-}
+}

examples/with-app-dir/src/components/ThemeToggle.tsx

@@ -3,13 +3,13 @@
 import { useTheme } from 'next-themes'
 
 function ThemeToggle() {
-  const { theme, setTheme } = useTheme()
+  const { theme, resolvedTheme, setTheme } = useTheme()
 
   return (
     <button
       className="mt-16 px-4 py-2 text-white dark:text-black bg-black dark:bg-white font-semibold rounded-md"
       onClick={() => {
-        setTheme(theme === 'light' ? 'dark' : 'light')
+        setTheme(resolvedTheme === 'light' ? 'dark' : 'light')
       }}
     >
       Change Theme

packages/next-themes/__tests__/index.test.tsx → next-themes/__tests__/index.test.tsx

@@ -1,14 +1,37 @@
-import { act, render, screen } from '@testing-library/react'
-import { ThemeProvider, useTheme } from '../src'
-import React, { useEffect } from 'react'
+// @vitest-environment jsdom
 
-let localStorageMock: { [key: string]: string } = {}
+import * as React from 'react'
+import { act, render, screen } from '@testing-library/react'
+import { vi, beforeAll, beforeEach, afterEach, afterAll, describe, test, it, expect } from 'vitest'
+import { cleanup } from '@testing-library/react'
+
+import { ThemeProvider, useTheme } from '../src/index'
+
+let originalLocalStorage: Storage
+const localStorageMock: Storage = (() => {
+  let store: Record<string, string> = {}
+
+  return {
+    getItem: vi.fn((key: string): string => store[key] ?? null),
+    setItem: vi.fn((key: string, value: string): void => {
+      store[key] = value.toString()
+    }),
+    removeItem: vi.fn((key: string): void => {
+      delete store[key]
+    }),
+    clear: vi.fn((): void => {
+      store = {}
+    }),
+    key: vi.fn((index: number): string | null => ''),
+    length: Object.keys(store).length
+  }
+})()
 
 // HelperComponent to render the theme inside a paragraph-tag and setting a theme via the forceSetTheme prop
 const HelperComponent = ({ forceSetTheme }: { forceSetTheme?: string }) => {
   const { setTheme, theme, forcedTheme, resolvedTheme, systemTheme } = useTheme()
 
-  useEffect(() => {
+  React.useEffect(() => {
     if (forceSetTheme) {
       setTheme(forceSetTheme)
     }
@@ -29,36 +52,42 @@ function setDeviceTheme(theme: 'light' | 'dark') {
   // Based on: https://stackoverflow.com/questions/39830580/jest-test-fails-typeerror-window-matchmedia-is-not-a-function
   Object.defineProperty(window, 'matchMedia', {
     writable: true,
-    value: jest.fn().mockImplementation(query => ({
+    value: vi.fn().mockImplementation(query => ({
       matches: theme === 'dark' ? true : false,
       media: query,
       onchange: null,
-      addListener: jest.fn(), // Deprecated
-      removeListener: jest.fn(), // Deprecated
-      addEventListener: jest.fn(),
-      removeEventListener: jest.fn(),
-      dispatchEvent: jest.fn()
+      addListener: vi.fn(), // Deprecated
+      removeListener: vi.fn(), // Deprecated
+      addEventListener: vi.fn(),
+      removeEventListener: vi.fn(),
+      dispatchEvent: vi.fn()
     }))
   })
 }
 
 beforeAll(() => {
   // Create mocks of localStorage getItem and setItem functions
-  global.Storage.prototype.getItem = jest.fn((key: string) => localStorageMock[key])
-  global.Storage.prototype.setItem = jest.fn((key: string, value: string) => {
-    localStorageMock[key] = value
-  })
+  originalLocalStorage = window.localStorage
+  window.localStorage = localStorageMock
 })
 
 beforeEach(() => {
-  // Reset global side-effects
+  // Reset window side-effects
   setDeviceTheme('light')
   document.documentElement.style.colorScheme = ''
   document.documentElement.removeAttribute('data-theme')
   document.documentElement.removeAttribute('class')
 
   // Clear the localStorage-mock
-  localStorageMock = {}
+  localStorageMock.clear()
+})
+
+afterEach(() => {
+  cleanup()
+})
+
+afterAll(() => {
+  window.localStorage = originalLocalStorage
 })
 
 describe('defaultTheme', () => {
@@ -129,8 +158,8 @@ describe('storage', () => {
       )
     })
 
-    expect(global.Storage.prototype.setItem).toBeCalledTimes(0)
-    expect(global.Storage.prototype.getItem('theme')).toBeUndefined()
+    expect(window.localStorage.setItem).toBeCalledTimes(0)
+    expect(window.localStorage.getItem('theme')).toBeNull()
   })
 
   test('should set localStorage when switching themes', () => {
@@ -142,8 +171,8 @@ describe('storage', () => {
       )
     })
 
-    expect(global.Storage.prototype.setItem).toBeCalledTimes(1)
-    expect(global.Storage.prototype.getItem('theme')).toBe('dark')
+    expect(window.localStorage.setItem).toBeCalledTimes(1)
+    expect(window.localStorage.getItem('theme')).toBe('dark')
   })
 })
 
@@ -157,8 +186,8 @@ describe('custom storageKey', () => {
       )
     })
 
-    expect(global.Storage.prototype.getItem).toHaveBeenCalledWith('theme')
-    expect(global.Storage.prototype.setItem).toHaveBeenCalledWith('theme', 'light')
+    expect(window.localStorage.getItem).toHaveBeenCalledWith('theme')
+    expect(window.localStorage.setItem).toHaveBeenCalledWith('theme', 'light')
   })
 
   test("should save to localStorage with 'custom' when setting prop 'storageKey' to 'customKey'", () => {
@@ -170,8 +199,8 @@ describe('custom storageKey', () => {
       )
     })
 
-    expect(global.Storage.prototype.getItem).toHaveBeenCalledWith('customKey')
-    expect(global.Storage.prototype.setItem).toHaveBeenCalledWith('customKey', 'light')
+    expect(window.localStorage.getItem).toHaveBeenCalledWith('customKey')
+    expect(window.localStorage.setItem).toHaveBeenCalledWith('customKey', 'light')
   })
 })
 
@@ -215,7 +244,7 @@ describe('custom attribute', () => {
 
 describe('custom value-mapping', () => {
   test('should use custom value mapping when using value={{pink:"my-pink-theme"}}', () => {
-    localStorageMock['theme'] = 'pink'
+    localStorageMock.setItem('theme', 'pink')
 
     act(() => {
       render(
@@ -229,7 +258,7 @@ describe('custom value-mapping', () => {
     })
 
     expect(document.documentElement.getAttribute('data-theme')).toBe('my-pink-theme')
-    expect(global.Storage.prototype.setItem).toHaveBeenCalledWith('theme', 'pink')
+    expect(window.localStorage.setItem).toHaveBeenCalledWith('theme', 'pink')
   })
 
   test('should allow missing values (attribute)', () => {
@@ -259,7 +288,7 @@ describe('custom value-mapping', () => {
 
 describe('forcedTheme', () => {
   test('should render saved theme when no forcedTheme is set', () => {
-    localStorageMock['theme'] = 'dark'
+    localStorageMock.setItem('theme', 'dark')
 
     render(
       <ThemeProvider>
@@ -272,7 +301,7 @@ describe('forcedTheme', () => {
   })
 
   test('should render light theme when forcedTheme is set to light', () => {
-    localStorageMock['theme'] = 'dark'
+    localStorageMock.setItem('theme', 'dark')
 
     act(() => {
       render(

next-themes/package.json

@@ -0,0 +1,29 @@
+{
+  "name": "next-themes",
+  "version": "0.3.0-beta.1",
+  "license": "MIT",
+  "main": "./dist/index.js",
+  "module": "./dist/index.mjs",
+  "types": "./dist/index.d.ts",
+  "files": [
+    "dist"
+  ],
+  "scripts": {
+    "prepublish": "pnpm build",
+    "build": "tsup src",
+    "dev": "tsup src --watch",
+    "test": "vitest run __tests__"
+  },
+  "peerDependencies": {
+    "react": "^16.8 || ^17 || ^18",
+    "react-dom": "^16.8 || ^17 || ^18"
+  },
+  "devDependencies": {
+    "react": "^18.2.0",
+    "react-dom": "^18.2.0"
+  },
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/pacocoursey/next-themes.git"
+  }
+}