run npm install to generate a package lock

node_modules/function-once/.editorconfig

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+
+root = true
+
+[*]
+charset = utf-8
+end_of_line = lf
+indent_size = 2
+indent_style = space
+insert_final_newline = true
+trim_trailing_whitespace = true

node_modules/function-once/dist/index.d.ts

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+declare const once: <T>(fn: () => T) => () => T;
+export default once;

node_modules/function-once/dist/index.js

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+/* MAIN */
+const once = (fn) => {
+    let called = false;
+    let result;
+    return () => {
+        if (!called) {
+            called = true;
+            result = fn();
+        }
+        return result;
+    };
+};
+/* EXPORT */
+export default once;

node_modules/function-once/license

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+The MIT License (MIT)
+
+Copyright (c) 2021-present Fabio Spampinato
+
+Permission is hereby granted, free of charge, to any person obtaining a
+copy of this software and associated documentation files (the "Software"),
+to deal in the Software without restriction, including without limitation
+the rights to use, copy, modify, merge, publish, distribute, sublicense,
+and/or sell copies of the Software, and to permit persons to whom the
+Software is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+DEALINGS IN THE SOFTWARE.

node_modules/function-once/package.json

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+{
+  "name": "function-once",
+  "repository": "github:fabiospampinato/function-once",
+  "description": "Wraps a function so that it's only ever executed once.",
+  "version": "3.0.0",
+  "type": "module",
+  "main": "dist/index.js",
+  "exports": "./dist/index.js",
+  "types": "./dist/index.d.ts",
+  "scripts": {
+    "clean": "tsex clean",
+    "compile": "tsex compile",
+    "compile:watch": "tsex compile --watch",
+    "test": "tsex test",
+    "test:watch": "tsex test --watch",
+    "prepublishOnly": "tsex prepare"
+  },
+  "keywords": [
+    "once",
+    "function",
+    "call"
+  ],
+  "devDependencies": {
+    "fava": "^0.2.1",
+    "tsex": "^3.0.1",
+    "typescript": "^5.1.6"
+  }
+}

node_modules/function-once/readme.md

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+# Function Once
+
+Wraps a function so that it's only ever executed once.
+
+Note: `this` is always set to `undefined` and only functions that don't accept any arguments are supported, as using those with a function that's only ever executed once is practically just a footgun. If you need different `this` or different arguments you should probably use memoization instead.
+
+## Install
+
+```sh
+npm install --save function-once
+```
+
+## Usage
+
+```ts
+import once from 'function-once';
+
+const rand = once (() => Math.random ());
+
+rand (); // => 0.3344627371267874
+rand (); // => 0.3344627371267874
+```
+
+## License
+
+MIT © Fabio Spampinato

node_modules/function-once/src/index.ts

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+
+/* MAIN */
+
+const once = <T> ( fn: (() => T) ): (() => T) => {
+
+  let called = false;
+  let result: T;
+
+  return (): T => {
+
+    if ( !called ) {
+
+      called = true;
+      result = fn ();
+
+    }
+
+    return result;
+
+  };
+
+};
+
+/* EXPORT */
+
+export default once;

node_modules/function-once/test/index.js

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+
+/* IMPORT */
+
+import {describe} from 'fava';
+import once from '../dist/index.js';
+
+/* MAIN */
+
+describe ( 'Function Once', it => {
+
+  it ( 'works', t => {
+
+    const rand = once ( () => Math.random () );
+    const value = rand ();
+
+    t.is ( rand (), value );
+    t.is ( rand (), value );
+    t.is ( rand (), value );
+
+  });
+
+});

node_modules/function-once/tsconfig.json

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+{
+  "extends": "tsex/tsconfig.json"
+}