chore: replace lodash.debounce with inline implementation

Replace lodash.debounce with a lightweight inline debounce utility,
removing the lodash.debounce and @types/lodash.debounce dependencies.

The inline implementation supports the same options used by ParentSize
(delay and leading), handles leading+trailing edge calls correctly,
provides cancel(), and resets state before invoking callbacks to
support re-entrant calls safely.

- New src/debounce.ts (0.46KB gzip vs external package)
- Updated ParentSize.tsx import
- Removed lodash.debounce from rollup externals in vite.config.ts
- Removed lodash.debounce + @types/lodash.debounce from package.json

Author: roli-lpci

package.json

@@ -39,14 +39,12 @@
   },
   "dependencies": {
     "blurhash": "2.0.5",
-    "lodash.debounce": "4.0.8",
     "react-merge-refs": "2.1.1",
     "thumbhash": "0.1.1"
   },
   "devDependencies": {
     "@splinetool/runtime": "^1.10.29",
     "@types/animejs": "^3.1.12",
-    "@types/lodash.debounce": "^4.0.9",
     "@types/node": "^20.14.1",
     "@types/react": "^18.3.3",
     "@types/react-dom": "^18.3.0",

src/ParentSize.tsx

@@ -1,7 +1,7 @@
 // Modified version of
 // https://github.com/airbnb/visx/blob/master/packages/visx-responsive/src/components/ParentSize.tsx
 'use client';
-import debounce from 'lodash.debounce';
+import debounce from './debounce';
 import { forwardRef, useEffect, useMemo, useRef, useState } from 'react';
 import { mergeRefs } from 'react-merge-refs';
 

src/debounce.ts

@@ -0,0 +1,56 @@
+type DebouncedFunction<T extends (...args: any[]) => void> = T & {
+  cancel: () => void;
+};
+
+export default function debounce<T extends (...args: any[]) => void>(
+  fn: T,
+  delay: number,
+  { leading = false }: { leading?: boolean } = {}
+): DebouncedFunction<T> {
+  let timeoutId: ReturnType<typeof setTimeout> | undefined;
+  let isLeadingInvoked = false;
+  let lastThis: unknown;
+  let lastArgs: Parameters<T> | undefined;
+
+  const debounced = function (this: unknown, ...args: Parameters<T>) {
+    lastThis = this;
+    lastArgs = args;
+
+    if (leading && !isLeadingInvoked) {
+      isLeadingInvoked = true;
+      fn.apply(this, args);
+      lastArgs = undefined; // Clear so we can detect subsequent calls
+    }
+
+    if (timeoutId !== undefined) {
+      clearTimeout(timeoutId);
+    }
+
+    timeoutId = setTimeout(() => {
+      const thisCtx = lastThis;
+      const thisArgs = lastArgs;
+      // Reset state BEFORE calling fn so re-entrant calls work correctly
+      isLeadingInvoked = false;
+      timeoutId = undefined;
+      lastArgs = undefined;
+
+      if (!leading) {
+        fn.apply(thisCtx, thisArgs!);
+      } else if (thisArgs !== undefined) {
+        // Leading+trailing: only fire trailing if there were calls after the leading
+        fn.apply(thisCtx, thisArgs);
+      }
+    }, delay);
+  } as DebouncedFunction<T>;
+
+  debounced.cancel = () => {
+    if (timeoutId !== undefined) {
+      clearTimeout(timeoutId);
+    }
+    timeoutId = undefined;
+    isLeadingInvoked = false;
+    lastArgs = undefined;
+  };
+
+  return debounced;
+}

vite.config.ts

@@ -33,7 +33,6 @@ export default defineConfig({
         'next/image',
         // these are the dependencies, they are listed in the package.json already
         'blurhash',
-        'lodash.debounce',
         'react-merge-refs',
         'thumbhash',
       ],

yarn.lock

@@ -1095,14 +1095,12 @@ __metadata:
   dependencies:
     "@splinetool/runtime": ^1.10.29
     "@types/animejs": ^3.1.12
-    "@types/lodash.debounce": ^4.0.9
     "@types/node": ^20.14.1
     "@types/react": ^18.3.3
     "@types/react-dom": ^18.3.0
     "@vitejs/plugin-react": ^4.3.0
     animejs: ^3.2.2
     blurhash: 2.0.5
-    lodash.debounce: 4.0.8
     modern-normalize: ^1.1.0
     next: 15.0.0-rc.0
     np: ^10.0.5
@@ -1223,22 +1221,6 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@types/lodash.debounce@npm:^4.0.9":
-  version: 4.0.9
-  resolution: "@types/lodash.debounce@npm:4.0.9"
-  dependencies:
-    "@types/lodash": "*"
-  checksum: 8183a152e01928e3b97ca773f6ae6038b8695e76493ba8bf6b743ec143948a62294fbc9d49fa4a78b52265b3ba4892ef57534e0c13d04aa0f111671b5a944feb
-  languageName: node
-  linkType: hard
-
-"@types/lodash@npm:*":
-  version: 4.14.191
-  resolution: "@types/lodash@npm:4.14.191"
-  checksum: ba0d5434e10690869f32d5ea49095250157cae502f10d57de0a723fd72229ce6c6a4979576f0f13e0aa9fbe3ce2457bfb9fa7d4ec3d6daba56730a51906d1491
-  languageName: node
-  linkType: hard
-
 "@types/node@npm:^20.14.1":
   version: 20.14.1
   resolution: "@types/node@npm:20.14.1"
@@ -3545,13 +3527,6 @@ __metadata:
   languageName: node
   linkType: hard
 
-"lodash.debounce@npm:4.0.8":
-  version: 4.0.8
-  resolution: "lodash.debounce@npm:4.0.8"
-  checksum: a3f527d22c548f43ae31c861ada88b2637eb48ac6aa3eb56e82d44917971b8aa96fbb37aa60efea674dc4ee8c42074f90f7b1f772e9db375435f6c83a19b3bc6
-  languageName: node
-  linkType: hard
-
 "lodash.zip@npm:^4.2.0":
   version: 4.2.0
   resolution: "lodash.zip@npm:4.2.0"