From ce0e0450329c603a1634d8674c96b8607a9c531f Mon Sep 17 00:00:00 2001
From: Matthew Fedderly <24275386+mfedderly@users.noreply.github.com>
Date: Tue, 16 Dec 2025 16:30:59 -0500
Subject: [PATCH] Move to Extract for @turf/helpers' geometry()

---
 packages/turf-helpers/index.ts | 27 +++++++++++++--------------
 1 file changed, 13 insertions(+), 14 deletions(-)

diff --git a/packages/turf-helpers/index.ts b/packages/turf-helpers/index.ts
index c6c354754..d6cd0d7dc 100644
--- a/packages/turf-helpers/index.ts
+++ b/packages/turf-helpers/index.ts
@@ -219,27 +219,26 @@ export function geometry<
   type: T,
   coordinates: any[],
   _options: Record<string, never> = {}
-): {
-  Point: Point;
-  LineString: LineString;
-  Polygon: Polygon;
-  MultiPoint: MultiPoint;
-  MultiLineString: MultiLineString;
-  MultiPolygon: MultiPolygon;
-}[T] {
+): Extract<Geometry, { type: T }> {
   switch (type) {
     case "Point":
-      return point(coordinates).geometry as any;
+      return point(coordinates).geometry as Extract<Geometry, { type: T }>;
     case "LineString":
-      return lineString(coordinates).geometry as any;
+      return lineString(coordinates).geometry as Extract<Geometry, { type: T }>;
     case "Polygon":
-      return polygon(coordinates).geometry as any;
+      return polygon(coordinates).geometry as Extract<Geometry, { type: T }>;
     case "MultiPoint":
-      return multiPoint(coordinates).geometry as any;
+      return multiPoint(coordinates).geometry as Extract<Geometry, { type: T }>;
     case "MultiLineString":
-      return multiLineString(coordinates).geometry as any;
+      return multiLineString(coordinates).geometry as Extract<
+        Geometry,
+        { type: T }
+      >;
     case "MultiPolygon":
-      return multiPolygon(coordinates).geometry as any;
+      return multiPolygon(coordinates).geometry as Extract<
+        Geometry,
+        { type: T }
+      >;
     default:
       throw new Error(type + " is invalid");
   }