> For the complete documentation index, see [llms.txt](https://router5.js.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://router5.js.org/introduction.md).

# Introduction

- [Why router5?](https://router5.js.org/introduction/why-router5.md)
- [Getting Started](https://router5.js.org/introduction/getting-started.md)
- [Ecosystem](https://router5.js.org/introduction/ecosystem.md)
- [Core concepts](https://router5.js.org/introduction/core-concepts.md)
- [Transition phase](https://router5.js.org/introduction/transition-phase.md)