Lodash Internal Create Cache Module

3.1.2 · abandoned · verified Tue Apr 21

lodash._createcache is a modularized internal utility from the Lodash v3 ecosystem, specifically version 3.1.2, last published approximately seven years ago (around 2019). Its original purpose was to provide a standalone CommonJS module for Lodash's internal cache creation logic, often used by functions like `_.memoize`. Unlike the main Lodash library (currently at v4.18.1), which is actively maintained with a regular release cadence, `lodash._createcache` is an abandoned package and no longer receives updates, bug fixes, or security patches. Developers should be aware that its functionality and API are deeply tied to the older Lodash v3 implementation and are not guaranteed to be compatible or safe with modern Lodash versions (v4+) or contemporary JavaScript environments. It serves primarily as a historical artifact of Lodash's modularization efforts during its v3 era.

Common errors

```
ReferenceError: require is not defined
```
cause Attempting to use `require()` in an ES module environment (e.g., Node.js with 'type: module' or modern frontend bundles) where `require` is not globally available.

fix This package is CommonJS-only. Ensure your environment supports CommonJS `require` calls, or use a build tool (like Webpack or Rollup) configured to handle CJS modules. Alternatively, avoid this abandoned package entirely.
```
TypeError: createCache is not a function
```
cause Incorrect import syntax (e.g., `import { createCache } from 'lodash._createcache';`) for a CommonJS module that exports a single function as its `module.exports`.

fix Use the correct CommonJS `require` syntax: `const createCache = require('lodash._createcache');`.
```
Cannot read properties of undefined (reading 'has')
```
cause An object created by `createCache` from an older Lodash version is being used in a context that expects a different cache interface or environment (e.g., with a modern `_.memoize` implementation expecting a specific `Map`-like structure).

fix Verify that the `createCache` output is compatible with the consumer. Given this package's age, direct integration with modern Lodash features is highly discouraged. Refactor to use modern caching mechanisms or the `_.memoize` from an up-to-date `lodash` package.

Warnings

breaking This package is tightly coupled with Lodash v3 internals and is incompatible with Lodash v4.0.0 and newer versions. Major architectural changes in Lodash v4 mean that relying on this package with a modern Lodash installation will likely lead to unexpected behavior or errors.
Fix: Avoid using this package if your project uses Lodash v4 or higher. Instead, rely on the main `lodash` package's built-in functionality (e.g., `_.memoize`) or its internal cache mechanisms if directly interacting with Lodash internals.
gotcha As an internal utility, `lodash._createcache` was not designed for external public consumption. Its API might be unstable or assume specific internal Lodash contexts. Direct use may require deep understanding of Lodash v3's internal workings and is generally discouraged.
Fix: Re-evaluate if you truly need this specific internal caching primitive. For most use cases, `_.memoize` from the main Lodash library (even v3) provides a safer, higher-level abstraction. For modern applications, consider `Map` or `WeakMap` for custom caching solutions or modern memoization libraries.
breaking The package `lodash._createcache` is abandoned and has not received updates since its initial publication ~7 years ago (relative to current date). It will not receive bug fixes, performance improvements, or security patches for any newly discovered vulnerabilities, potentially exposing applications to risks.
Fix: Deprecate usage of `lodash._createcache` and migrate to actively maintained alternatives. For caching, consider native `Map`/`WeakMap`, or if a Lodash-like `memoize` is needed, use `_.memoize` from an up-to-date `lodash` package (v4.x) or other modern memoization libraries.

Install

npm install lodash._createcache npm
yarn add lodash._createcache yarn
pnpm add lodash._createcache pnpm

Imports

createCache
wrong:
```
import { createCache } from 'lodash._createcache';
```
correct:
```
const createCache = require('lodash._createcache');
```
This package is CommonJS-only, tied to Lodash v3, and does not support ES modules or modern import syntax.

Quickstart

Demonstrates the CommonJS import and basic usage of the `createCache` function to simulate an internal caching mechanism, similar to how it might have been used by Lodash v3's memoization features.

const createCache = require('lodash._createcache');

// In Lodash v3, a cache created by `createCache` typically provided
// methods like `get`, `set`, and `has`. This example demonstrates
// a simplified usage pattern for an internal cache.

const memoizationCache = createCache();

function expensiveCalculation(value) {
  const cacheKey = String(value);

  if (memoizationCache.has(cacheKey)) {
    console.log(`Cache hit for key: ${cacheKey}`);
    return memoizationCache.get(cacheKey);
  }

  console.log(`Cache miss for key: ${cacheKey}, performing expensive calculation...`);
  const result = value * value * 3.14159; // Simulate heavy computation
  memoizationCache.set(cacheKey, result);
  return result;
}

console.log(`Result for 10: ${expensiveCalculation(10)}`); // Cache miss, compute
console.log(`Result for 20: ${expensiveCalculation(20)}`); // Cache miss, compute
console.log(`Result for 10: ${expensiveCalculation(10)}`); // Cache hit, retrieve

// This illustrates direct interaction with the created cache object.
// In actual Lodash v3, this would typically be used internally by `_.memoize`.

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