✨ Example for Textualize/textual#4292

greedy_textarea.py

@@ -0,0 +1,30 @@
+"""Example for https://github.com/Textualize/textual/issues/4292"""
+
+from pathlib import Path
+
+from textual.app import App, ComposeResult
+from textual.widgets import Collapsible, TextArea
+
+
+class GreedyScrollbarApp(App[None]):
+    BINDINGS = [("f1", "collapse")]
+
+    CSS = """
+    TextArea {
+        height: 10;
+    }
+    """
+
+    def compose(self) -> ComposeResult:
+        for n in range(5):
+            with Collapsible(title=f"This is collapsible #{n}", collapsed=bool(n)):
+                yield TextArea(Path(__file__).read_text(), language="python")
+
+    def action_collapse(self) -> None:
+        target.collapsed = not (target := self.query(Collapsible).first()).collapsed
+
+
+if __name__ == "__main__":
+    GreedyScrollbarApp().run()
+
+### greedy_textarea.py ends here