Why is routing needed in SPA applications?

Routing in SPA applications is needed to emulate the behavior of a multi-page site, but without a full page reload.

Specifically, it's needed for:

• Splitting the application into logical sections: /home, /profile, /settings, etc.
• Convenient navigation for the user - the familiar way of moving through links.
• Preserving navigation history - the "Back" button works, links can be shared.
• Loading only the components that are needed - faster and more economical.
• Deep integration with the URL - you can pass parameters, do lazy loading, and guard routes.

Without routing, the whole application would be one big component - inconvenient, unreadable, and unmanageable.