feat: improve pinch gesture ux

Author: SSShooter

CHANGELOG.md

@@ -1,5 +1,15 @@
 # Changelog
 
+## 5.9.1 - 2026-02-24
+
+### Features
+
+- Improve pinch gesture ux
+
+### Refactors
+
+- Remove top-level scope document to avoid immediate errors in SSR applications
+
 ## 5.9.0 - 2026-02-21
 
 ### Features

package.json

@@ -1,6 +1,6 @@
 {
   "name": "mind-elixir",
-  "version": "5.9.0",
+  "version": "5.9.1",
   "type": "module",
   "description": "Mind elixir is a free open source mind map core.",
   "keywords": [

src/mouse.ts

@@ -267,24 +267,14 @@ export default function (mind: MindElixirInstance) {
         if (lastDistance == null) {
           lastDistance = newDistance
         } else {
-          const delta = newDistance - lastDistance
-          const THRESHOLD = 8
-
-          if (Math.abs(delta) > THRESHOLD) {
-            if (delta > 0) {
-              handleZoom(mind, 'in', {
-                x: (p1.x + p2.x) / 2,
-                y: (p1.y + p2.y) / 2,
-              })
-            } else {
-              handleZoom(mind, 'out', {
-                x: (p1.x + p2.x) / 2,
-                y: (p1.y + p2.y) / 2,
-              })
-            }
-
-            lastDistance = newDistance
+          if (lastDistance > 0) {
+            const scaleRatio = newDistance / lastDistance
+            mind.scale(mind.scaleVal * scaleRatio, {
+              x: (p1.x + p2.x) / 2,
+              y: (p1.y + p2.y) / 2,
+            })
           }
+          lastDistance = newDistance
         }
         return
       }