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82 lines
2.2 KiB
82 lines
2.2 KiB
import type { FunctionalComponent } from 'preact';
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import { useState, useEffect } from 'preact/hooks';
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import './ThemeToggleButton.css';
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const themes = ['light', 'dark'];
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const icons = [
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<svg
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xmlns="http://www.w3.org/2000/svg"
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width="20"
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height="20"
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viewBox="0 0 20 20"
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fill="currentColor"
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>
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<path
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fillRule="evenodd"
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d="M10 2a1 1 0 011 1v1a1 1 0 11-2 0V3a1 1 0 011-1zm4 8a4 4 0 11-8 0 4 4 0 018 0zm-.464 4.95l.707.707a1 1 0 001.414-1.414l-.707-.707a1 1 0 00-1.414 1.414zm2.12-10.607a1 1 0 010 1.414l-.706.707a1 1 0 11-1.414-1.414l.707-.707a1 1 0 011.414 0zM17 11a1 1 0 100-2h-1a1 1 0 100 2h1zm-7 4a1 1 0 011 1v1a1 1 0 11-2 0v-1a1 1 0 011-1zM5.05 6.464A1 1 0 106.465 5.05l-.708-.707a1 1 0 00-1.414 1.414l.707.707zm1.414 8.486l-.707.707a1 1 0 01-1.414-1.414l.707-.707a1 1 0 011.414 1.414zM4 11a1 1 0 100-2H3a1 1 0 000 2h1z"
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clipRule="evenodd"
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/>
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</svg>,
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<svg
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xmlns="http://www.w3.org/2000/svg"
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width="20"
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height="20"
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viewBox="0 0 20 20"
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fill="currentColor"
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>
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<path d="M17.293 13.293A8 8 0 016.707 2.707a8.001 8.001 0 1010.586 10.586z" />
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</svg>,
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];
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const ThemeToggle: FunctionalComponent = () => {
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const [theme, setTheme] = useState(() => {
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if (import.meta.env.SSR) {
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return undefined;
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}
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if (typeof localStorage !== undefined && localStorage.getItem('theme')) {
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return localStorage.getItem('theme');
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}
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if (window.matchMedia('(prefers-color-scheme: dark)').matches) {
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return 'dark';
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}
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return 'light';
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});
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useEffect(() => {
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const root = document.documentElement;
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if (theme === 'light') {
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root.classList.remove('theme-dark');
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} else {
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root.classList.add('theme-dark');
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}
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}, [theme]);
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return (
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<div className="theme-toggle">
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{themes.map((t, i) => {
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const icon = icons[i];
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const checked = t === theme;
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return (
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<label className={checked ? ' checked' : ''}>
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{icon}
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<input
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type="radio"
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name="theme-toggle"
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checked={checked}
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value={t}
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title={`Use ${t} theme`}
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aria-label={`Use ${t} theme`}
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onChange={() => {
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localStorage.setItem('theme', t);
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setTheme(t);
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}}
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/>
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</label>
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);
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})}
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</div>
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);
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};
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export default ThemeToggle;
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