From 559a9656411db2980c78ec6f9b71908ce586fc06 Mon Sep 17 00:00:00 2001
From: Vincent Esche <regexident@gmail.com>
Date: Sat, 7 Jun 2025 13:48:21 +0200
Subject: [PATCH 1/3] =?UTF-8?q?Remove=20`Prettify<=E2=80=A6>`=20from=20a?=
 =?UTF-8?q?=20few=20types?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../src/lib/components/ForceSimulation.svelte        | 12 +++++-------
 1 file changed, 5 insertions(+), 7 deletions(-)

diff --git a/packages/layerchart/src/lib/components/ForceSimulation.svelte b/packages/layerchart/src/lib/components/ForceSimulation.svelte
index 1787ef4d0..5505bb2c6 100644
--- a/packages/layerchart/src/lib/components/ForceSimulation.svelte
+++ b/packages/layerchart/src/lib/components/ForceSimulation.svelte
@@ -18,12 +18,12 @@
     links?: TLink[];
   };
 
-  export type LinkPosition = Prettify<{
+  export type LinkPosition = {
     x1: number;
     y1: number;
     x2: number;
     y2: number;
-  }>;
+  };
 
   /**
    * Default initial alpha value of the simulation.
@@ -52,11 +52,10 @@
    */
   export const DEFAULT_VELOCITY_DECAY: number = 0.4;
 
-  type NodeDatumFor<NodeDatum> = Prettify<NodeDatum & SimulationNodeDatum>;
+  type NodeDatumFor<NodeDatum> = NodeDatum & SimulationNodeDatum;
 
-  type LinkDatumFor<NodeDatum, LinkDatum> = Prettify<
-    LinkDatum & SimulationLinkDatum<NodeDatumFor<NodeDatum>>
-  >;
+  type LinkDatumFor<NodeDatum, LinkDatum> = LinkDatum &
+    SimulationLinkDatum<NodeDatumFor<NodeDatum>>;
 
   type SimulationFor<NodeDatum, LinkDatum> = Simulation<
     NodeDatumFor<NodeDatum>,
@@ -160,7 +159,6 @@
     LinkDatum extends SimulationLinkDatum<NodeDatum> | undefined,"
 >
   import { watch } from 'runed';
-  import type { Prettify } from '@layerstack/utils';
 
   let {
     forces,

From bf2094f1649b2d417774228e7dde64fbd83e053d Mon Sep 17 00:00:00 2001
From: Vincent Esche <regexident@gmail.com>
Date: Sat, 7 Jun 2025 14:29:49 +0200
Subject: [PATCH 2/3] feat(force-simulation): Refine `onstart`/`ontick`/`onend`
 events of `ForceSimulation`

---
 .changeset/proud-llamas-fold.md               |  5 ++
 .../src/lib/components/ForceSimulation.svelte | 63 ++++++++++++++++---
 2 files changed, 59 insertions(+), 9 deletions(-)
 create mode 100644 .changeset/proud-llamas-fold.md

diff --git a/.changeset/proud-llamas-fold.md b/.changeset/proud-llamas-fold.md
new file mode 100644
index 000000000..83835d202
--- /dev/null
+++ b/.changeset/proud-llamas-fold.md
@@ -0,0 +1,5 @@
+---
+'layerchart': patch
+---
+
+feat(force-simulation): Refined `onstart`/`ontick`/`onend` events of `ForceSimulation`
diff --git a/packages/layerchart/src/lib/components/ForceSimulation.svelte b/packages/layerchart/src/lib/components/ForceSimulation.svelte
index 5505bb2c6..94f4fa495 100644
--- a/packages/layerchart/src/lib/components/ForceSimulation.svelte
+++ b/packages/layerchart/src/lib/components/ForceSimulation.svelte
@@ -25,6 +25,35 @@
     y2: number;
   };
 
+  export type OnStartEvent<
+    NodeDatum extends SimulationNodeDatum,
+    LinkDatum extends SimulationLinkDatum<NodeDatum> | undefined,
+  > = {
+    alpha: number;
+    alphaTarget: number;
+    simulation: SimulationFor<NodeDatum, LinkDatum>;
+  };
+
+  export type OnTickEvent<
+    NodeDatum extends SimulationNodeDatum,
+    LinkDatum extends SimulationLinkDatum<NodeDatum> | undefined,
+  > = {
+    alpha: number;
+    alphaTarget: number;
+    nodes: NodeDatumFor<NodeDatum>[];
+    links: LinkDatumFor<NodeDatum, LinkDatum>[];
+    simulation: SimulationFor<NodeDatum, LinkDatum>;
+  };
+
+  export type OnEndEvent<
+    NodeDatum extends SimulationNodeDatum,
+    LinkDatum extends SimulationLinkDatum<NodeDatum> | undefined,
+  > = {
+    alpha: number;
+    alphaTarget: number;
+    simulation: SimulationFor<NodeDatum, LinkDatum>;
+  };
+
   /**
    * Default initial alpha value of the simulation.
    */
@@ -128,17 +157,17 @@
     /**
      * Callback function triggered when simulation starts
      */
-    onStart?: () => void;
+    onStart?: (e: OnStartEvent<NodeDatum, LinkDatum | undefined>) => void;
 
     /**
      * Callback function triggered on each simulation tick
      */
-    onTick?: (e: { alpha: number; alphaTarget: number }) => void;
+    onTick?: (e: OnTickEvent<NodeDatum, LinkDatum | undefined>) => void;
 
     /**
      * Callback function triggered when simulation ends
      */
-    onEnd?: () => void;
+    onEnd?: (e: OnEndEvent<NodeDatum, LinkDatum | undefined>) => void;
 
     children?: Snippet<
       [
@@ -170,9 +199,9 @@
     velocityDecay = DEFAULT_VELOCITY_DECAY,
     stopped = false,
     static: staticProp,
-    onStart: onStartProp = () => {},
-    onTick: onTickProp = () => {},
-    onEnd: onEndProp = () => {},
+    onStart: onStartProp,
+    onTick: onTickProp,
+    onEnd: onEndProp,
     children,
     cloneNodes = false,
   }: ForceSimulationProps<NodeDatum, LinkDatum> = $props();
@@ -429,7 +458,12 @@
     }
 
     paused = false;
-    onStartProp();
+
+    onStartProp?.({
+      alpha,
+      alphaTarget,
+      simulation,
+    });
   }
 
   function onTick() {
@@ -437,7 +471,13 @@
     pullAlphaFromSimulation();
     updateLinkPositions();
 
-    onTickProp({ alpha, alphaTarget });
+    onTickProp?.({
+      alpha,
+      alphaTarget,
+      nodes: simulatedNodes,
+      links: simulatedLinks,
+      simulation,
+    });
   }
 
   function onEnd() {
@@ -447,7 +487,12 @@
     }
 
     paused = true;
-    onEndProp();
+
+    onEndProp?.({
+      alpha,
+      alphaTarget,
+      simulation,
+    });
   }
 
   $effect(() => {

From 7b92eec61d479a9dad13ad374401070a8bcf65a6 Mon Sep 17 00:00:00 2001
From: Sean Lynch <techniq35@gmail.com>
Date: Sat, 7 Jun 2025 11:47:09 -0400
Subject: [PATCH 3/3] Update proud-llamas-fold.md

---
 .changeset/proud-llamas-fold.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.changeset/proud-llamas-fold.md b/.changeset/proud-llamas-fold.md
index 83835d202..567e9e834 100644
--- a/.changeset/proud-llamas-fold.md
+++ b/.changeset/proud-llamas-fold.md
@@ -2,4 +2,4 @@
 'layerchart': patch
 ---
 
-feat(force-simulation): Refined `onstart`/`ontick`/`onend` events of `ForceSimulation`
+feat(ForceSimulation): Refined `onstart`/`ontick`/`onend` events of `ForceSimulation`