# libtmux.data/active-window

- **Module:** libtmux.data
- **Package:** io.github.libtmux:libtmux-clojure
- **Language:** Clojure
- **Kind:** function
- **Source:** https://github.com/libtmux/libtmux-java/blob/5f88402151ff08fc0390dd438b90963692ec3fe4/libtmux-clojure/src/main/clojure/libtmux/data.clj#L143
- **Public owner:** libtmux.data
- **Page:** https://libtmux.org/en/clojure/latest/reference/libtmux-data-active-window/

```
(active-window session)
```

Returns the captured active window of a session, or `nil`.

[[windows]] returns all captured occurrences; [[active-pane]] follows the active one.

## Parameters

- `session`