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feat: implement dark/light mode toggle (issue #170) #199
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,18 @@ | ||
| "use client"; | ||
| import React from "react"; | ||
| import Header from "./Header/Header"; | ||
| import ChatBot from "./ChatBot/ChatBot"; | ||
|
|
||
| export default function ClientLayout({ | ||
| children, | ||
| }: { | ||
| children: React.ReactNode; | ||
| }) { | ||
| return ( | ||
| <> | ||
| <Header /> | ||
| <ChatBot /> | ||
| {children} | ||
| </> | ||
| ); | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,35 @@ | ||
| "use client"; | ||
| import { SunIcon, MoonIcon } from "@heroicons/react/24/outline"; | ||
| import { useTheme } from "../context/ThemeContext"; | ||
| import { useEffect, useState } from "react"; | ||
|
|
||
| export default function ThemeToggle() { | ||
| const { theme, toggleTheme } = useTheme(); | ||
| const [mounted, setMounted] = useState(false); | ||
|
|
||
| useEffect(() => { | ||
| setMounted(true); | ||
| }, []); | ||
|
|
||
| // Prevent hydration mismatch by not rendering until mounted | ||
| if (!mounted) { | ||
| return ( | ||
| <div className="p-2 w-9 h-9" /> // Placeholder to prevent layout shift | ||
| ); | ||
| } | ||
|
|
||
| return ( | ||
| <button | ||
| onClick={toggleTheme} | ||
| className="p-2 rounded-lg bg-gray-200 dark:bg-gray-700 hover:bg-gray-300 dark:hover:bg-gray-600 transition-colors duration-200" | ||
| aria-label="Toggle theme" | ||
| title={`Switch to ${theme === "light" ? "dark" : "light"} mode`} | ||
| > | ||
| {theme === "light" ? ( | ||
| <MoonIcon className="h-5 w-5 text-gray-800 dark:text-gray-200" /> | ||
| ) : ( | ||
| <SunIcon className="h-5 w-5 text-gray-800 dark:text-gray-200" /> | ||
| )} | ||
| </button> | ||
| ); | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,53 @@ | ||
| "use client"; | ||
| import React, { createContext, useContext, useEffect, useState } from "react"; | ||
|
|
||
| type Theme = "light" | "dark"; | ||
|
|
||
| interface ThemeContextType { | ||
| theme: Theme; | ||
| toggleTheme: () => void; | ||
| } | ||
|
|
||
| const ThemeContext = createContext<ThemeContextType | undefined>(undefined); | ||
|
|
||
| export function ThemeProvider({ children }: { children: React.ReactNode }) { | ||
| const [theme, setTheme] = useState<Theme>("light"); | ||
| const [mounted, setMounted] = useState(false); | ||
|
|
||
| // Load theme from localStorage on mount | ||
| useEffect(() => { | ||
| setMounted(true); | ||
| const savedTheme = localStorage.getItem("theme") as Theme; | ||
| if (savedTheme) { | ||
| setTheme(savedTheme); | ||
| document.documentElement.classList.toggle("dark", savedTheme === "dark"); | ||
| } else { | ||
| // Check system preference | ||
| const prefersDark = window.matchMedia("(prefers-color-scheme: dark)").matches; | ||
| const initialTheme = prefersDark ? "dark" : "light"; | ||
| setTheme(initialTheme); | ||
| document.documentElement.classList.toggle("dark", prefersDark); | ||
| } | ||
| }, []); | ||
|
|
||
| const toggleTheme = () => { | ||
| const newTheme = theme === "light" ? "dark" : "light"; | ||
| setTheme(newTheme); | ||
| localStorage.setItem("theme", newTheme); | ||
| document.documentElement.classList.toggle("dark", newTheme === "dark"); | ||
| }; | ||
|
|
||
| return ( | ||
| <ThemeContext.Provider value={{ theme, toggleTheme }}> | ||
| {children} | ||
| </ThemeContext.Provider> | ||
| ); | ||
| } | ||
|
|
||
| export function useTheme() { | ||
| const context = useContext(ThemeContext); | ||
| if (context === undefined) { | ||
| throw new Error("useTheme must be used within a ThemeProvider"); | ||
| } | ||
| return context; | ||
| } | ||
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Validate
localStoragetheme + drop unusedmounted.Right now any truthy
localStorage.getItem("theme")is trusted via a cast, andmountedis unused. Safer to validate and simplify.export function ThemeProvider({ children }: { children: React.ReactNode }) { const [theme, setTheme] = useState<Theme>("light"); - const [mounted, setMounted] = useState(false); // Load theme from localStorage on mount useEffect(() => { - setMounted(true); - const savedTheme = localStorage.getItem("theme") as Theme; - if (savedTheme) { - setTheme(savedTheme); - document.documentElement.classList.toggle("dark", savedTheme === "dark"); + const savedTheme = localStorage.getItem("theme"); + if (savedTheme === "light" || savedTheme === "dark") { + setTheme(savedTheme); + document.documentElement.classList.toggle("dark", savedTheme === "dark"); } else { // Check system preference const prefersDark = window.matchMedia("(prefers-color-scheme: dark)").matches; const initialTheme = prefersDark ? "dark" : "light"; setTheme(initialTheme); document.documentElement.classList.toggle("dark", prefersDark); } }, []);🤖 Prompt for AI Agents