Check for a valid Number value.
npm install num-or-notNumbers, and values that can be cast or evaluated to numbers will return true.
All other values will return false.
``
$ npm install --save num-or-not
`js
const isNumber = require('num-or-not');
// Integers
isNumber(5); // => true
isNumber(-5); // => true
isNumber('5'); // => true
isNumber('-5'); // => true
// Floats (Decimal & Comma)
isNumber(5.0); // => true
isNumber('5.0'); // => true
isNumber('5,0'); // => true
// Octal (ES6)
isNumber(0o144); // => true
isNumber(0O144); // => true
isNumber('0o144'); // => true
isNumber('0O144'); // => true
// Binary (ES6)
isNumber(0b0); // => true
isNumber('0b0'); // => true
// Hexadecimal
isNumber(0xFF); // => true
isNumber('0xFF'); // => true
// Exponential
isNumber(6e3); // => true
isNumber(12e-2); // => true
isNumber('6e3'); // => true
isNumber('12e-2'); // => true
// Currency Values
isNumber('12,456,789'); // => true
isNumber('45,678.123'); // => true
// "Evaluates to Int" values
isNumber(+''); // => true
isNumber(+[]); // => true
isNumber(+[0]); // => true
isNumber(+true); // => true
isNumber(+new Date); // => true
`
- These binary and octal formats are only supported in ES6 environments:
- Binary: 0b0
- Octal: & 0O144
- In order to support numbers with commas or decimals (currencies, Dewey Decimal System, etc), some unique values can pass as valid numbers (see Issue #1):
-
-
- Open a pull request or issue if you think we need tighter control over these limitations.
Why do we need another open source number validator in Javascript? We don't, but I wanted one to help keep me accountable of the data type nuances in JS.
MIT @ Michael Wuergler