Nothing.js – A chainable mock object which always returns itself

In plain words

Nothing.js is a JavaScript library that creates chainable mock objects designed to always return themselves. This tool is useful for developers who need to test code that makes multiple method calls in sequence without worrying about actual implementations. By allowing any method to be called on the object and returning the same object each time, it simplifies the process of creating flexible test doubles and mocks during software development.

written from the facts on this page · September 2026

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