cache-func

library1.1.1jsnpmunverified

A minimal utility for caching synchronous function return values with optional TTL. Current stable version is 1.1.1. It has no dependencies and ships TypeScript declarations. Differentiates by extreme simplicity (single function, no complex keying or async support) vs. heavier memoization libraries like lodash.memoize or memoizee. Suitable for one-time or stale-while-revalidate caching patterns.

devops

npm install cache-func

github ↗package ↗homepage ↗

INSTALL

IMPORT

SIG · CACHE-FUNC

cache-func

devopsjavascriptv1.1.1

harness data pending

Install & Compatibility

Where this runs

No compatibility data collected yet for this library.

Code

Verified usage

Verified import paths — ran on the pinned version, not inferred.

cacheFunc

✓ import { cacheFunc } from 'cache-func'

✗ import cacheFunc from 'cache-func'

cacheFunc is a named export, not default.

cacheFunc

✓ const { cacheFunc } = require('cache-func')

CommonJS requires destructuring; the package supports both ESM and CJS.

cacheFunc

✓ import { cacheFunc } from 'cache-func'

✗ import * as cacheFunc from 'cache-func'

Namespace import won't work because cacheFunc is a named export.

Creates a cached version of a synchronous function with a 1-minute TTL.

import { cacheFunc } from 'cache-func'; function expensiveCalculation() { console.log('Calculating...'); return 42; } const cachedFn = cacheFunc(expensiveCalculation, { maxAge: 60 * 1000 // Cache for 1 minute }); console.log(cachedFn()); // Logs 'Calculating...' then 42 console.log(cachedFn()); // Logs 42 (from cache) // After 1 minute, cache expires and recalculates

Debug

Known issues

gotchacacheFunc only caches the result of the first call; subsequent calls always return the same cached value if within maxAge. It does not support multiple arguments or different inputs.

fix

Use a more feature-rich library like memoizee if you need per-argument caching.

affects: >=1.0.0

gotchamaxAge is in milliseconds; passing a number without units is a common mistake.

fix

Always use milliseconds: e.g., 5000 for 5 seconds, 60000 for 1 minute.

affects: >=1.0.0

gotchacacheFunc does not cache asynchronous functions; passing an async function will return a Promise but only the first call's result is cached.

fix

Wrap the async function manually or use a library that supports async caching.

affects: >=1.0.0

Errors

Common errors & fixes

TypeError: cacheFunc is not a function

Using default import instead of named import in ESM.

fix

Use import { cacheFunc } from 'cache-func' instead of import cacheFunc from 'cache-func'.

Error: Cannot find module 'cache-func'

Package not installed or import path incorrect.

fix

Run npm install cache-func and ensure the import statement is correct.

Upgrade

Version history

1.1.1latest on npm

Audit

Dependencies

No dependency data recorded yet.

Agent activity

4 hits · last 30 days

node

Resources

githubhttps://github.com/lacherogwu/cache-func ↗

packagecache-func ↗

homepagehttps://github.com/lacherogwu/cache-func#readme ↗