Next.jsとshadcn/uiを使うとダークモードのトグルボタンが爆速で作ることができるので紹介します。
next-themesをインストール
zsh
bun add next-themes
テーマプロバイダーを作成
components/theme-provider.tsx
"use client"
import * as React from "react"
import { ThemeProvider as NextThemesProvider } from "next-themes"
import { type ThemeProviderProps } from "next-themes/dist/types"
export function ThemeProvider({ children, ...props }: ThemeProviderProps) {
return <NextThemesProvider {...props}>{children}</NextThemesProvider>
}
テーマプロバイダーをlayout.tsxに配置
layout.tsx
import { ThemeProvider } from "@/components/theme-provider"
import type { Metadata } from "next";
import { Inter } from "next/font/google";
import "./globals.css";
const inter = Inter({ subsets: ["latin"] });
export const metadata: Metadata = {
title: "Create Next App",
description: "Generated by create next app",
};
export default function RootLayout({
children,
}: Readonly<{
children: React.ReactNode;
}>) {
return (
<html lang="en" suppressHydrationWarning>
<body className={inter.className}>
<ThemeProvider
attribute="class"
defaultTheme="system"
enableSystem
disableTransitionOnChange
>
{children}
</ThemeProvider>
</body>
</html>
);
}
トグルボタンコンポーネントを作成
mode-toggle.tsx
"use client"
import * as React from "react"
import { MoonIcon, SunIcon } from "@radix-ui/react-icons"
import { useTheme } from "next-themes"
import { Button } from "@/components/ui/button"
import {
DropdownMenu,
DropdownMenuContent,
DropdownMenuItem,
DropdownMenuTrigger,
} from "@/components/ui/dropdown-menu"
export function ModeToggle() {
const { setTheme } = useTheme()
return (
<DropdownMenu>
<DropdownMenuTrigger asChild>
<Button variant="outline" size="icon">
<SunIcon className="h-[1.2rem] w-[1.2rem] rotate-0 scale-100 transition-all dark:-rotate-90 dark:scale-0" />
<MoonIcon className="absolute h-[1.2rem] w-[1.2rem] rotate-90 scale-0 transition-all dark:rotate-0 dark:scale-100" />
<span className="sr-only">Toggle theme</span>
</Button>
</DropdownMenuTrigger>
<DropdownMenuContent align="end">
<DropdownMenuItem onClick={() => setTheme("light")}>
Light
</DropdownMenuItem>
<DropdownMenuItem onClick={() => setTheme("dark")}>
Dark
</DropdownMenuItem>
<DropdownMenuItem onClick={() => setTheme("system")}>
System
</DropdownMenuItem>
</DropdownMenuContent>
</DropdownMenu>
)
}
完成
作成したModeToggleコンポーネントを設置すると以下のようなボタンが作られます！
参考