rudeshark.net/packages/client/src/scripts/device-kind.ts

import { defaultStore } from "@/store";

const ua = navigator.userAgent.toLowerCase();
const isTablet =
	/ipad/.test(ua) ||
	(/mobile|iphone|android/.test(ua) && window.innerWidth > 700);
const isSmartphone = !isTablet && /mobile|iphone|android/.test(ua);

export const deviceKind = defaultStore.state.overridedDeviceKind
	? defaultStore.state.overridedDeviceKind
	: isSmartphone
	? "smartphone"
	: isTablet
	? "tablet"
	: "desktop";