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outvariant

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outvariant

Type-safe implementation of invariant with positionals.

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What is outvariant?

The outvariant package is a utility library for creating invariant conditions in JavaScript and TypeScript applications. It allows developers to enforce certain conditions or assumptions in their code, throwing errors when those conditions are not met. This can be particularly useful for validating arguments, ensuring application states, or enforcing coding contracts during development.

What are outvariant's main functionalities?

Invariant enforcement

This feature allows developers to enforce conditions within their code. If the condition fails, an error is thrown with a custom message. In the example, an error is thrown if an attempt is made to divide by zero.

import { invariant } from 'outvariant';

function divide(a, b) {
  invariant(b !== 0, 'Attempted to divide by zero.');
  return a / b;
}

Warn

This feature enables developers to issue warnings instead of errors. It's useful for deprecation notices or highlighting undesirable but non-fatal behavior. In the example, a warning is issued for using a deprecated function.

import { warn } from 'outvariant';

function deprecatedFunction() {
  warn('deprecatedFunction is deprecated and will be removed in the next major release.');
}

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Package last updated on 05 Jul 2024

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