dgx-spark-playbooks/nvidia/multi-agent-chatbot/assets/frontend/src/components/ThemeToggle.tsx
2025-10-04 21:21:42 +00:00

63 lines
2.4 KiB
TypeScript

/*
# SPDX-FileCopyrightText: Copyright (c) 1993-2025 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
# SPDX-License-Identifier: Apache-2.0
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
*/
"use client";
import { useState, useEffect } from 'react';
export default function ThemeToggle() {
const [isDark, setIsDark] = useState(false);
useEffect(() => {
// Check if user has a theme preference
const isDarkMode = localStorage.getItem('theme') === 'dark' ||
(!localStorage.getItem('theme') && window.matchMedia('(prefers-color-scheme: dark)').matches);
setIsDark(isDarkMode);
if (isDarkMode) {
document.documentElement.classList.add('dark');
}
}, []);
const toggleTheme = () => {
setIsDark(!isDark);
if (!isDark) {
document.documentElement.classList.add('dark');
localStorage.setItem('theme', 'dark');
} else {
document.documentElement.classList.remove('dark');
localStorage.setItem('theme', 'light');
}
};
return (
<button
onClick={toggleTheme}
className="fixed top-4 right-4 p-2 rounded-full bg-white dark:bg-gray-800 shadow-lg hover:shadow-xl transition-all duration-200 z-50"
aria-label="Toggle theme"
>
{isDark ? (
<svg className="w-6 h-6 text-yellow-500" fill="none" stroke="currentColor" viewBox="0 0 24 24">
<path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M12 3v1m0 16v1m9-9h-1M4 12H3m15.364 6.364l-.707-.707M6.343 6.343l-.707-.707m12.728 0l-.707.707M6.343 17.657l-.707.707M16 12a4 4 0 11-8 0 4 4 0 018 0z" />
</svg>
) : (
<svg className="w-6 h-6 text-gray-700" fill="none" stroke="currentColor" viewBox="0 0 24 24">
<path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M20.354 15.354A9 9 0 018.646 3.646 9.003 9.003 0 0012 21a9.003 9.003 0 008.354-5.646z" />
</svg>
)}
</button>
);
}