Modelo.js Inheritance Utility

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library 4.2.3 ·javascript
verified May 27, 2026

Modelo.js is a JavaScript utility providing a robust and performant mechanism for object inheritance, specifically designed to extend Node.js's `util.inherits` with multiple inheritance capabilities. As of version 4.2.3, it allows developers to inherit from multiple base objects seamlessly, addressing a common limitation in standard JavaScript inheritance patterns. A key feature is the `isInstance` method, which is automatically added to instances and serves as a reliable replacement for the native `instanceof` operator when working with multiple inheritance, as `instanceof` is inherently limited to single-prototype chains. The library emphasizes performance, aiming for overhead comparable to `util.inherits` despite its added complexity. While the release cadence isn't explicitly detailed, the version number suggests ongoing maintenance. It differentiates itself by offering a familiar Node.js-style interface while introducing powerful multiple inheritance features, making it suitable for projects requiring flexible object composition.

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