is-undefined
Check if a value is undefined or not.
Last updated 8 years ago by ionicabizau .
MIT · Repository · Bugs · Original npm · Tarball · package.json
$ npm install is-undefined 
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is-undefined

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Check if a value is undefined or not.

:cloud: Installation

# Using npm
npm install --save is-undefined

# Using yarn
yarn add is-undefined

:clipboard: Example

const isUndefined = require("is-undefined");

console.log(isUndefined(undefined));
// => true

console.log(isUndefined(false));
// => false

console.log(isUndefined(null));
// => false

:question: Get Help

There are few ways to get help:

  1. Please post questions on Stack Overflow. You can open issues with questions, as long you add a link to your Stack Overflow question.
  2. For bug reports and feature requests, open issues. :bug:
  3. For direct and quick help, you can use Codementor. :rocket:

:memo: Documentation

isUndefined(input)

Checks if a value is undefined or not.

Params

  • Anything input: The input value.

Return

  • Boolean true, if the input is undefined, false otherwise.

:yum: How to contribute

Have an idea? Found a bug? See how to contribute.

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:dizzy: Where is this library used?

If you are using this library in one of your projects, add it in this list. :sparkles:

  • tilda
  • cli-box
  • powershell
  • spooky-element
  • obj-unflatten
  • spooky-view-manager
  • is-eq-four
  • is-eq-six
  • is-eq-five
  • is-eq-three
  • is-eq-two
  • is-eq-one
  • is-eq-zero
  • is-eq-seven
  • is-eq-eight
  • @khoulzo/itsm-date-formatter
  • spooky-router
  • octothorpe-xo
  • get-key-or-default
  • is-eq-ten
  • is-eq-nine

:scroll: License

MIT © Ionică Bizău

Current Tags

  • 1.0.11                                ...           latest (4 years ago)

12 Versions

  • 1.0.11                                ...           4 years ago
  • 1.0.10                                ...           6 years ago
  • 1.0.9                                ...           7 years ago
  • 1.0.8                                ...           7 years ago
  • 1.0.7                                ...           8 years ago
  • 1.0.6                                ...           8 years ago
  • 1.0.5                                ...           8 years ago
  • 1.0.4                                ...           8 years ago
  • 1.0.3                                ...           8 years ago
  • 1.0.2                                ...           8 years ago
  • 1.0.1                                ...           9 years ago
  • 1.0.0                                ...           9 years ago
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