# fibo/not-defined

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5 stars · 3 forks · JavaScript · MIT

## Links

- GitHub: https://github.com/fibo/not-defined
- awesome-repositories: https://awesome-repositories.com/repository/fibo-not-defined.md

## Description

checks if foo is not defined, i.e. undefined, null, an empty string, array, object or NaN

## Tags

### Part of an Awesome List

- [General Utilities](https://awesome-repositories.com/f/awesome-lists/devtools/general-utilities.md) — Checks if a value is null, undefined, or empty.