The Problem with React State Modals In traditional React applications, if a user clicks a "Task" on a Kanban board, developers typically pop open a modal using a boolean state: const [isOpen, setIsOpen] = useState(false) . For a basic alert, this is fine. But for a complex B2B SaaS dashboard at Smart Tech Devs, this architecture is fundamentally broken. If the user hits the browser's "Refresh" button, the modal vanishes, and their context is lost. If they copy the URL and send it to a coworker on Slack, the coworker only sees the default dashboard, not the specific task. You have trapped critical UI inside transient local state. The Paradigm Shift: URL-Driven Modals A fundamental rule of modern web architecture is that any distinct piece of content must have its own URL. Next.js 13+ introduced two revolutionary concepts to solve this exact problem: Parallel Routes and Intercepting Routes .…