67 lines
1.7 KiB
TypeScript
67 lines
1.7 KiB
TypeScript
"use client"
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import * as React from "react"
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import { Moon, Sun, Monitor } from "lucide-react"
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import { useTheme } from "next-themes"
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import { Button } from "@/components/ui/button"
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import {
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DropdownMenu,
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DropdownMenuContent,
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DropdownMenuItem,
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DropdownMenuTrigger,
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} from "@/components/ui/dropdown-menu"
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const THEME_ICONS = {
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light: Sun,
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dark: Moon,
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system: Monitor,
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} as const
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type ThemeOption = keyof typeof THEME_ICONS
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const THEME_OPTIONS: { value: ThemeOption; label: string }[] = [
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{ value: "light", label: "Light theme" },
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{ value: "dark", label: "Dark theme" },
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{ value: "system", label: "System" },
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]
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export function ThemeToggle() {
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const { setTheme, theme, resolvedTheme } = useTheme()
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const [mounted, setMounted] = React.useState(false)
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React.useEffect(() => {
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const timeout = setTimeout(() => setMounted(true), 0)
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return () => clearTimeout(timeout)
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}, [])
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// Once mounted, resolve "system" to its actual rendered theme for the icon
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const activeIcon = !mounted
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? Sun
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: THEME_ICONS[theme === "system" ? (resolvedTheme as ThemeOption) : (theme as ThemeOption)] ?? Sun
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const Icon = activeIcon
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return (
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<DropdownMenu>
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<DropdownMenuTrigger asChild>
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<Button variant="ghost" size="icon">
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<Icon />
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<span className="sr-only">Toggle theme</span>
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</Button>
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</DropdownMenuTrigger>
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<DropdownMenuContent align="end">
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{THEME_OPTIONS.map(({ value, label }) => {
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const OptionIcon = THEME_ICONS[value]
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return (
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<DropdownMenuItem key={value} onClick={() => setTheme(value)}>
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<OptionIcon />
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{label}
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</DropdownMenuItem>
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)
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})}
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</DropdownMenuContent>
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</DropdownMenu>
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)
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}
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