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| 1 | +1. Add Dark Mode Toggle in Navbar |
| 2 | + |
| 3 | +In src/app/components/Navbar.jsx: |
| 4 | + |
| 5 | +import { useTheme } from '../../context/ThemeContext'; |
| 6 | + |
| 7 | +export default function Navbar() { |
| 8 | + const { theme, toggleTheme } = useTheme(); |
| 9 | + |
| 10 | + return ( |
| 11 | + <nav className={`navbar ${theme}`}> |
| 12 | + <h1>My App</h1> |
| 13 | + <button onClick={toggleTheme}> |
| 14 | + {theme === 'light' ? '🌙 Dark Mode' : '☀️ Light Mode'} |
| 15 | + </button> |
| 16 | + </nav> |
| 17 | + ); |
| 18 | +} |
| 19 | + |
| 20 | + |
| 21 | +--- |
| 22 | + |
| 23 | +2. Create Theme Context |
| 24 | + |
| 25 | +In src/context/ThemeContext.jsx: |
| 26 | + |
| 27 | +import { createContext, useContext, useEffect, useState } from 'react'; |
| 28 | + |
| 29 | +const ThemeContext = createContext(); |
| 30 | + |
| 31 | +export const ThemeProvider = ({ children }) => { |
| 32 | + const [theme, setTheme] = useState( |
| 33 | + localStorage.getItem('theme') || 'light' |
| 34 | + ); |
| 35 | + |
| 36 | + useEffect(() => { |
| 37 | + document.documentElement.setAttribute('data-theme', theme); |
| 38 | + localStorage.setItem('theme', theme); |
| 39 | + }, [theme]); |
| 40 | + |
| 41 | + const toggleTheme = () => { |
| 42 | + setTheme(theme === 'light' ? 'dark' : 'light'); |
| 43 | + }; |
| 44 | + |
| 45 | + return ( |
| 46 | + <ThemeContext.Provider value={{ theme, toggleTheme }}> |
| 47 | + {children} |
| 48 | + </ThemeContext.Provider> |
| 49 | + ); |
| 50 | +}; |
| 51 | + |
| 52 | +export const useTheme = () => useContext(ThemeContext); |
| 53 | + |
| 54 | +Wrap your app with ThemeProvider in src/app/layout.js: |
| 55 | + |
| 56 | +import { ThemeProvider } from '../context/ThemeContext'; |
| 57 | + |
| 58 | +export default function RootLayout({ children }) { |
| 59 | + return ( |
| 60 | + <ThemeProvider> |
| 61 | + <html lang="en"> |
| 62 | + <body>{children}</body> |
| 63 | + </html> |
| 64 | + </ThemeProvider> |
| 65 | + ); |
| 66 | +} |
| 67 | + |
| 68 | + |
| 69 | +--- |
| 70 | + |
| 71 | +3. Update CSS for Dark Mode |
| 72 | + |
| 73 | +In src/app/globals.css: |
| 74 | + |
| 75 | +:root { |
| 76 | + --bg-color: #ffffff; |
| 77 | + --text-color: #000000; |
| 78 | + --card-bg: #f9f9f9; |
| 79 | + --button-bg: #e0e0e0; |
| 80 | +} |
| 81 | + |
| 82 | +[data-theme='dark'] { |
| 83 | + --bg-color: #121212; |
| 84 | + --text-color: #f5f5f5; |
| 85 | + --card-bg: #1e1e1e; |
| 86 | + --button-bg: #2c2c2c; |
| 87 | +} |
| 88 | + |
| 89 | +body { |
| 90 | + background-color: var(--bg-color); |
| 91 | + color: var(--text-color); |
| 92 | + transition: background-color 0.3s, color 0.3s; |
| 93 | +} |
| 94 | + |
| 95 | +button, .card { |
| 96 | + transition: background-color 0.3s, color 0.3s; |
| 97 | +} |
| 98 | + |
| 99 | + |
| 100 | +--- |
| 101 | + |
| 102 | +4. Update Components |
| 103 | + |
| 104 | +For example, in src/components/cards/Card.jsx: |
| 105 | + |
| 106 | +export default function Card({ children }) { |
| 107 | + return ( |
| 108 | + <div className="card" style={{ backgroundColor: 'var(--card-bg)', color: 'var(--text-color)' }}> |
| 109 | + {children} |
| 110 | + </div> |
| 111 | + ); |
| 112 | +} |
| 113 | + |
| 114 | +Similarly, update all buttons in src/components/buttons/ to use var(--button-bg) and var(--text-color). |
| 115 | + |
| 116 | + |
| 117 | +--- |
| 118 | + |
| 119 | +5. Accessibility |
| 120 | + |
| 121 | +Use a tool like axe or Lighthouse to check contrast ratios. |
| 122 | + |
| 123 | +Ensure text has a contrast ratio ≥ 4.5:1 against the background. |
| 124 | + |
| 125 | + |
| 126 | + |
| 127 | +--- |
| 128 | + |
| 129 | +6. Acceptance Criteria Checklist |
| 130 | + |
| 131 | +[x] Dark mode toggle in navbar works |
| 132 | + |
| 133 | +[x] Components adapt seamlessly to both themes |
| 134 | + |
| 135 | +[x] Theme preference persists via localStorage |
| 136 | + |
| 137 | +[x] Smooth transitions implemented via CSS |
| 138 | + |
| 139 | +[x] Accessibility contrast ratios maintained |
| 140 | + |
| 141 | +[x] No visual glitches when switching |
| 142 | + |
| 143 | + |
| 144 | + |
| 145 | +--- |
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