onetime
A utility that ensures a function is executed only once, returning the cached result on subsequent calls.
What is onetime?
onetime is a JavaScript library that wraps a function to ensure it is called only once, caching and returning the initial result on all subsequent calls. It solves the problem of unintended repeated execution, such as in initialization routines or idempotent operations, by providing a simple, predictable utility.
JavaScript developers working in Node.js or browser environments who need to enforce single execution for functions, particularly in scenarios involving setup, lazy loading, or preventing side effects.
Developers choose onetime for its lightweight, non-invasive approach that avoids extending `Function.prototype`, along with features like error throwing on repeated calls and call count tracking for better control and debugging.
Overview
Ensure a function is only called once
Use Cases
Best For
- Initializing configurations or resources that should only run once
- Implementing lazy loading patterns where a function should execute only on first access
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