50 أسطر
1.3 KiB
TypeScript
50 أسطر
1.3 KiB
TypeScript
"use client";
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import { createContext, useContext, useEffect, useState } from "react";
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export type Theme = "dark" | "light";
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type ThemeContextValue = {
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theme: Theme;
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toggle: () => void;
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};
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const ThemeContext = createContext<ThemeContextValue | null>(null);
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const STORAGE_KEY = "oudelaa.theme";
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function applyTheme(theme: Theme) {
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if (typeof document === "undefined") return;
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const root = document.documentElement;
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root.classList.remove("theme-dark", "theme-light");
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root.classList.add(`theme-${theme}`);
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}
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export function ThemeProvider({ children }: { children: React.ReactNode }) {
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const [theme, setTheme] = useState<Theme>("dark");
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useEffect(() => {
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const stored = window.localStorage.getItem(STORAGE_KEY) as Theme | null;
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const initial = stored ?? "dark";
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setTheme(initial);
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applyTheme(initial);
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}, []);
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const toggle = () => {
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setTheme((prev) => {
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const next = prev === "dark" ? "light" : "dark";
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window.localStorage.setItem(STORAGE_KEY, next);
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applyTheme(next);
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return next;
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});
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};
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return <ThemeContext.Provider value={{ theme, toggle }}>{children}</ThemeContext.Provider>;
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}
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export function useTheme() {
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const ctx = useContext(ThemeContext);
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if (!ctx) throw new Error("useTheme must be used within ThemeProvider");
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return ctx;
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}
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