is-in-browser/dist/index.mjs

export const isJsDom = typeof navigator === "object" && navigator.userAgent && navigator.userAgent.includes("jsdom");
export const isNode = typeof process === "object" && !!process.versions && !!process.versions.node;
export const isBrowser = typeof window === "object" && typeof document === "object" && document.nodeType === 9;
export default isBrowser;