https://sushilife.top/js/theme.js

1(() => {
2    const match = document.cookie.match(/(?:^|; )theme=([^;]+)/);
3    const setTheme = (theme) => {
4        document.documentElement.classList.add(`${theme}-mode`);
5    };
6
7    const setSystemTheme = () => {
8        if (window.matchMedia("(prefers-color-scheme: dark)").matches) {
9            setTheme("dark");
10        } else {
11            setTheme("light");
12        }
13        const mediaQueryList = window.matchMedia("(prefers-color-scheme: dark)");
14        mediaQueryList.addEventListener("change", (event) => {
15            document.documentElement.classList.replace(
16                event.matches ? "light-mode" : "dark-mode",
17                event.matches ? "dark-mode" : "light-mode"
18            );
19        });
20    };
21
22    if (match) {
23        const theme = match[1];
24        if (theme === "system") {
25            setSystemTheme();
26            return;
27        }
28        setTheme(theme);
29        return;
30    }
31    setTheme("light");
32})();