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- <span class="cline-any cline-neutral"> </span></td><td class="text"><pre class="prettyprint lang-js"><span class="cstat-no" title="statement not covered" >import { createContext, useContext, useEffect, useState, type ReactNode } from 'react';<span class="fstat-no" title="function not covered" ><span class="branch-0 cbranch-no" title="branch not covered" ></span></span></span>
-
- type Theme = 'light' | 'dark';
-
- interface ThemeContextType {
- theme: Theme;
- toggleTheme: () => void;
- setTheme: (theme: Theme) => void;
- }
-
- <span class="cstat-no" title="statement not covered" >const ThemeContext = createContext<ThemeContextType | undefined>(undefined);</span>
-
- <span class="cstat-no" title="statement not covered" >export function ThemeProvider({ children }: { children: ReactNode }) {</span>
- <span class="cstat-no" title="statement not covered" > const [theme, setThemeState] = useState<Theme>(() => {</span>
- <span class="cstat-no" title="statement not covered" > const stored = localStorage.getItem('theme') as Theme | null;</span>
- <span class="cstat-no" title="statement not covered" > if (stored) return stored;</span>
- // Default to dark theme
- <span class="cstat-no" title="statement not covered" > return 'dark';</span>
- <span class="cstat-no" title="statement not covered" > });</span>
-
- <span class="cstat-no" title="statement not covered" > useEffect(() => {</span>
- <span class="cstat-no" title="statement not covered" > const root = document.documentElement;</span>
- <span class="cstat-no" title="statement not covered" > if (theme === 'dark') {</span>
- <span class="cstat-no" title="statement not covered" > root.classList.add('dark');</span>
- <span class="cstat-no" title="statement not covered" > } else {</span>
- <span class="cstat-no" title="statement not covered" > root.classList.remove('dark');</span>
- <span class="cstat-no" title="statement not covered" > }</span>
- <span class="cstat-no" title="statement not covered" > localStorage.setItem('theme', theme);</span>
- <span class="cstat-no" title="statement not covered" > }, [theme]);</span>
-
- <span class="cstat-no" title="statement not covered" > const toggleTheme = () => {</span>
- <span class="cstat-no" title="statement not covered" > setThemeState((prev) => (prev === 'dark' ? 'light' : 'dark'));</span>
- <span class="cstat-no" title="statement not covered" > };</span>
-
- <span class="cstat-no" title="statement not covered" > const setTheme = (newTheme: Theme) => {</span>
- <span class="cstat-no" title="statement not covered" > setThemeState(newTheme);</span>
- <span class="cstat-no" title="statement not covered" > };</span>
-
- <span class="cstat-no" title="statement not covered" > return (</span>
- <span class="cstat-no" title="statement not covered" > <ThemeContext.Provider value={{ theme, toggleTheme, setTheme }}></span>
- <span class="cstat-no" title="statement not covered" > {children}</span>
- <span class="cstat-no" title="statement not covered" > </ThemeContext.Provider></span>
- );
- <span class="cstat-no" title="statement not covered" >}</span>
-
- <span class="cstat-no" title="statement not covered" >export function useTheme() {</span>
- <span class="cstat-no" title="statement not covered" > const context = useContext(ThemeContext);</span>
- <span class="cstat-no" title="statement not covered" > if (!context) {</span>
- <span class="cstat-no" title="statement not covered" > throw new Error('useTheme must be used within a ThemeProvider');</span>
- <span class="cstat-no" title="statement not covered" > }</span>
- <span class="cstat-no" title="statement not covered" > return context;</span>
- <span class="cstat-no" title="statement not covered" >}</span>
- </pre></td></tr></table></pre>
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