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- # defined <sup>[![Version Badge][npm-version-svg]][package-url]</sup>
- [![github actions][actions-image]][actions-url]
- [![coverage][codecov-image]][codecov-url]
- [![License][license-image]][license-url]
- [![Downloads][downloads-image]][downloads-url]
- [![npm badge][npm-badge-png]][package-url]
- return the first argument that is `!== undefined`
- Most of the time when I chain together `||`s, I actually just want the first
- item that is not `undefined`, not the first non-falsy item.
- This module is like the defined-or (`//`) operator in perl 5.10+.
- # example
- ``` js
- var defined = require('defined');
- var opts = { y : false, w : 4 };
- var x = defined(opts.x, opts.y, opts.w, 100);
- console.log(x);
- ```
- ```
- $ node example/defined.js
- false
- ```
- The return value is `false` because `false` is the first item that is
- `!== undefined`.
- # methods
- ``` js
- var defined = require('defined')
- ```
- ## var x = defined(a, b, c...)
- Return the first item in the argument list `a, b, c...` that is `!== undefined`.
- If all the items are `=== undefined`, return undefined.
- # install
- With [npm](https://npmjs.org) do:
- ```
- npm install defined
- ```
- # license
- MIT
- [package-url]: https://npmjs.org/package/defined
- [npm-version-svg]: https://versionbadg.es/inspect-js/defined.svg
- [deps-svg]: https://david-dm.org/inspect-js/defined.svg
- [deps-url]: https://david-dm.org/inspect-js/defined
- [dev-deps-svg]: https://david-dm.org/inspect-js/defined/dev-status.svg
- [dev-deps-url]: https://david-dm.org/inspect-js/defined#info=devDependencies
- [npm-badge-png]: https://nodei.co/npm/defined.png?downloads=true&stars=true
- [license-image]: https://img.shields.io/npm/l/defined.svg
- [license-url]: LICENSE
- [downloads-image]: https://img.shields.io/npm/dm/defined.svg
- [downloads-url]: https://npm-stat.com/charts.html?package=defined
- [codecov-image]: https://codecov.io/gh/inspect-js/defined/branch/main/graphs/badge.svg
- [codecov-url]: https://app.codecov.io/gh/inspect-js/defined/
- [actions-image]: https://img.shields.io/endpoint?url=https://github-actions-badge-u3jn4tfpocch.runkit.sh/inspect-js/defined
- [actions-url]: https://github.com/inspect-js/defined/actions
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