isnumber
Advanced tools
Package description
The isnumber npm package is a utility that helps determine if a given value is a number. It is useful for validation and type-checking in JavaScript applications.
Basic Number Check
This feature allows you to check if a given value is a number. It returns true for numeric values and false for non-numeric values.
const isNumber = require('isnumber');
console.log(isNumber(123)); // true
console.log(isNumber('123')); // falseCheck for NaN
This feature ensures that NaN (Not-a-Number) is correctly identified as not being a number.
const isNumber = require('isnumber');
console.log(isNumber(NaN)); // falseCheck for Infinity
This feature allows you to check if a value is Infinity, which is considered a number in JavaScript.
const isNumber = require('isnumber');
console.log(isNumber(Infinity)); // trueThe is-numeric package provides similar functionality to isnumber by checking if a value is numeric. It also handles edge cases like NaN and Infinity. Compared to isnumber, is-numeric may offer more comprehensive checks for numeric values.
The lodash.isnumber package is a part of the Lodash library, which provides utility functions for common programming tasks. lodash.isnumber specifically checks if a value is a number. It is similar to isnumber but is part of a larger utility library, making it useful if you are already using Lodash in your project.
The is-number package is another utility for checking if a value is a number. It is similar to isnumber but may have different performance characteristics and edge case handling. It is a lightweight alternative for number validation.
Readme
isNumber is a super tiny module that provides a test to see if a value is a finite number.
By super tiny, I mean like a single line -- however, I tend to use this somewhat frequently, so module it is!
var isNumber = require("isnumber")
isNumber(13) // true
isNumber("1241.12") // true
isNumber(0xff) // true
isNumber(Infinity) // false
isNumber("cat") // false
isNumber({foo: "bar"}) // false
MIT
FAQs
A simple test to see if a value is a non-infinite number.
The npm package isnumber receives a total of 93,187 weekly downloads. As such, isnumber popularity was classified as popular.
We found that isnumber demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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