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fix: dark mode #87

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fix: dark mode #87

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51 changes: 33 additions & 18 deletions components/toggleDarkMode.tsx
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Original file line number Diff line number Diff line change
@@ -1,27 +1,42 @@
import { useState } from 'react';
import { useCallback, useEffect, useState } from 'react';

import { MoonIcon, SunIcon } from './icons';

export const LIGHTS_OUT = 'lights-out';

export default function ToggleDarkMode({ className }: { className?: string }) {
const [isDarkMode, setDarkMode] = useState(false);

const handleClick = () => {
const hasDarkMode = document.documentElement.hasAttribute(LIGHTS_OUT);

return toggleDarkMode(!hasDarkMode);
};

const toggleDarkMode = (shouldBeDark) => {
document.documentElement.toggleAttribute(LIGHTS_OUT, shouldBeDark);

setDarkMode(shouldBeDark);
const [isDarkMode, setIsDarkMode] = useState(
globalThis.localStorage &&
globalThis.localStorage.getItem(LIGHTS_OUT) === 'true'
);
useEffect(() => {
const mq = window.matchMedia('(prefers-color-scheme: dark)');

writeToStorage(shouldBeDark);
};
if (mq.matches) {
setIsDarkMode(true);
}

const writeToStorage = (prefersDark) => {
localStorage.setItem(LIGHTS_OUT, prefersDark ? 'true' : 'false');
};
// This callback will fire if the preferred color scheme changes without a reload
mq.addEventListener('change', (evt) => setIsDarkMode(evt.matches));
}, []);
useEffect(() => {
console.log('isDarkMode changed!', isDarkMode);
if (isDarkMode) {
globalThis.document.documentElement.dataset.theme = 'dark';
} else {
globalThis.document.documentElement.dataset.theme = null;
}
}, [isDarkMode]);
const handleClick = useCallback(() => {
setIsDarkMode((wasDarkMode) => {
if (wasDarkMode) {
globalThis.localStorage.removeItem(LIGHTS_OUT);
} else {
globalThis.localStorage.setItem(LIGHTS_OUT, 'true');
}
return !wasDarkMode;
});
}, []);
return (
<button
className={className}
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6 changes: 6 additions & 0 deletions pages/_document.tsx
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Original file line number Diff line number Diff line change
@@ -1,9 +1,15 @@
import { Html, Head, Main, NextScript } from 'next/document';
// eslint-disable-next-line @next/next/no-script-in-document
import Script from 'next/script';

export default function Document() {
return (
<Html lang="uk-UA">
<Head>
<Script
src="../utils/apply-dark-mode.ts"
strategy="beforeInteractive"
/>
<script
dangerouslySetInnerHTML={{
__html:
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18 changes: 18 additions & 0 deletions utils/apply-dark-mode.ts
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Original file line number Diff line number Diff line change
@@ -0,0 +1,18 @@
const LIGHTS_OUT = 'lights-out';
const theme =
globalThis.localStorage && globalThis.localStorage.getItem(LIGHTS_OUT);

if (theme === 'true') {
document.documentElement.dataset.theme = 'dark';
} else {
document.documentElement.dataset.theme = null;
}

if (
window.matchMedia &&
window.matchMedia('(prefers-color-scheme: dark)').matches
) {
document.documentElement.dataset.theme = 'dark';
} else {
document.documentElement.dataset.theme = null;
}