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remove theme event listener on cleanup

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This commit is contained in:
Nathaniel Tampus
2023-03-06 22:01:39 +08:00
parent 483af2c615
commit feafffe53e
1 changed files with 7 additions and 3 deletions
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10
client/src/components/ThemeToggle.tsx
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@@ -7,11 +7,15 @@ export default function ThemeToggle() {
const [darkTheme, setDarkTheme] = useState(false);
useEffect(() => {
window
.matchMedia("(prefers-color-scheme: dark)")
.addEventListener("change", (e) => changeTheme(e.matches ? "dark" : "light"));
const onChange = (e: MediaQueryListEvent) => changeTheme(e.matches ? "dark" : "light");
window.matchMedia("(prefers-color-scheme: dark)").addEventListener("change", onChange);
changeTheme(window.matchMedia("(prefers-color-scheme: dark)").matches ? "dark" : "light");
return () => {
window.matchMedia("(prefers-color-scheme: dark)").removeEventListener("change", onChange);
};
}, []);
function changeTheme(theme: "dark" | "light") {