Package - is-nan-x

is-nan-x

ES6-compliant shim for Number.isNaN - the global isNaN returns false positives.

Last updated 5 years ago by xotic750 .

MIT · Repository · Bugs · Original npm · Tarball · package.json

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is-nan-x

ES6-compliant shim for Number.isNaN - the global isNaN returns false positives.

`module.exports(value)` ⇒ `boolean` ⏏

This method determines whether the passed value is NaN and its type is Number. It is a more robust version of the original, global isNaN().

Kind: Exported function
Returns: boolean - true if the given value is NaN and its type is Number; otherwise, false.

Param	Type	Description
value	`*`	The value to be tested for NaN.

Example

import numberIsNaN from 'is-nan-x';

console.log(numberIsNaN(NaN)); // true
console.log(numberIsNaN(Number.NaN)); // true
console.log(numberIsNaN(0 / 0)); // true

// e.g. these would have been true with global isNaN()
console.log(numberIsNaN('NaN')); // false
console.log(numberIsNaN(undefined)); // false
console.log(numberIsNaN({}); // false
console.log(numberIsNaN('blabla')); // false

// These all return false
console.log(numberIsNaN(true));
console.log(numberIsNaN(null));
console.log(numberIsNaN(37));
console.log(numberIsNaN('37'));
console.log(numberIsNaN('37.37'));
console.log(numberIsNaN(''));
console.log(numberIsNaN(' '));

Current Tags

2.1.1 ... latest (5 years ago)

36 Versions

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Dev Dependencies (66)

@babel/cli ^7.5.0
@babel/core ^7.5.4
@babel/node ^7.5.0
@babel/plugin-proposal-class-properties ^7.5.0
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@babel/plugin-transform-property-mutators ^7.2.0
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@babel/preset-env ^7.5.4
@babel/runtime ^7.5.4
@prorenata/eslint-config-vue ^1.13.6
@types/jest ^24.0.15
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babel-core ^7.0.0-0
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eslint =5.16.0
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eslint-plugin-css-modules ^2.11.0
eslint-plugin-eslint-comments ^3.1.2
eslint-plugin-html ^6.0.0
eslint-plugin-import ^2.18.0
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eslint-plugin-lodash ^5.1.0
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eslint-plugin-prettier ^3.1.0
eslint-plugin-promise ^4.2.1
eslint-plugin-sort-class-members ^1.5.0
eslint-plugin-switch-case ^1.1.2
eslint-plugin-vue ^5.2.3
friendly-errors-webpack-plugin ^1.7.0
identity-obj-proxy ^3.0.0
jest ^24.8.0
jest-cli ^24.8.0
jest-file ^1.0.0
jsdoc-to-markdown ^5.0.0
lodash ^4.17.14
lodash-webpack-plugin ^0.11.5
mkdirp ^0.5.1
node-notifier ^5.4.0
nodemon ^1.19.1
prettier =1.14.3
rimraf ^2.6.3
semver ^6.2.0
source-map-loader ^0.2.4
terser-webpack-plugin ^1.3.0
typescript ^3.5.3
webpack ^4.35.3
webpack-bundle-analyzer ^3.3.2
webpack-cli ^3.3.6
webpack-merge ^4.2.1

Dependents (3)

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