Instagram Auto Device Theme User Scripts

index.js

// ==UserScript==
// @name     Instagram Auto Device Theme
// @version  1.0.0
// @grant    none
// @author   Afnizar Nur Ghifari
// @license  GPL-3.0-or-later
// @match    https://www.instagram.com/*
// @icon     https://www.google.com/s2/favicons?sz=64&domain=instagram.com
// @grant    none
// ==/UserScript==

function setThemePreference() {
    const isDarkMode = window.matchMedia('(prefers-color-scheme: dark)').matches;
    localStorage.setItem('igt', isDarkMode ? 'dark' : 'light');
}

window.addEventListener('load', function() {
    setThemePreference();

    window.matchMedia('(prefers-color-scheme: dark)').addEventListener('change', setThemePreference);
});