npm package discovery and stats viewer.

Discover Tips

  • General search

    [free text search, go nuts!]

  • Package details

    pkg:[package-name]

  • User packages

    @[username]

Sponsor

Optimize Toolset

I’ve always been into building performant and accessible sites, but lately I’ve been taking it extremely seriously. So much so that I’ve been building a tool to help me optimize and monitor the sites that I build to make sure that I’m making an attempt to offer the best experience to those who visit them. If you’re into performant, accessible and SEO friendly sites, you might like it too! You can check it out at Optimize Toolset.

About

Hi, 👋, I’m Ryan Hefner  and I built this site for me, and you! The goal of this site was to provide an easy way for me to check the stats on my npm packages, both for prioritizing issues and updates, and to give me a little kick in the pants to keep up on stuff.

As I was building it, I realized that I was actually using the tool to build the tool, and figured I might as well put this out there and hopefully others will find it to be a fast and useful way to search and browse npm packages as I have.

If you’re interested in other things I’m working on, follow me on Twitter or check out the open source projects I’ve been publishing on GitHub.

I am also working on a Twitter bot for this site to tweet the most popular, newest, random packages from npm. Please follow that account now and it will start sending out packages soon–ish.

Open Software & Tools

This site wouldn’t be possible without the immense generosity and tireless efforts from the people who make contributions to the world and share their work via open source initiatives. Thank you 🙏

© 2024 – Pkg Stats / Ryan Hefner

@zerodep/is-null

v2.0.12

Published

A utility to determine if a value is null

Downloads

3

Readme

@zerodep/is-null

version language types license

CodeFactor Known Vulnerabilities

OpenSSF Best Practices

A simple, performant utility to determine if a value is null.

Full documentation is available at the zerodep.app page.

Signature

declare const isNull: (value: unknown) => boolean;

Examples

All @zerodep packages support both ESM and CJS formats, each complete with Typescript typings.

// ESM
import { isNull } from '@zerodep/is-null';

// CJS
const { isNull } = require('@zerodep/is-null');
// Arrays
isNull([]); // false
isNull([1, 2, 3]); // false
isNull(['a', 'b', 'c']); // false

// BigInts
isNull(42n); // false
isNull(0n); // false
isNull(-0n); // false
isNull(-42n); // false

// Booleans
isNull(true); // false
isNull(false); // false

// Class
isNull(
  class SomeClass {
    constructor() {}
  }
); // false

// Dates
isNull(new Date()); // false
isNull(new Date('1970-01-01T12:00:00.000Z')); // false
isNull(new Date('2099-12-31')); // false

// Empty
isNull(null); // true
isNull(undefined); // false

// Errors
isNull(new Error('message')); // false
isNull(new AggregateError([new Error('err1'), new Error('err2')], 'message')); // false

// Floats
isNull(3.14); // false
isNull(0.0); // false
isNull(-0.0); // false
isNull(-3.14); // false
isNull(Math.E); // false
isNull(Math.PI); // false
isNull(Number.MIN_VALUE); // false

// Functions
isNull(() => 'function'); // false
isNull(async () => 'function'); // false

// Generators
isNull(function* () {
  yield 'a';
}); // false
isNull(async function* () {
  yield 'a';
}); // false

// Maps
isNull(new Map()); // false
isNull(new Map([['key1', 123]])); // false
isNull(new Map([['key1', 'value1']])); // false

// Numbers
isNull(Number.POSITIVE_INFINITY); // false
isNull(Number.MAX_SAFE_INTEGER); // false
isNull(3e8); // false
isNull(42); // false
isNull(1); // false
isNull(0); // false
isNull(-0); // false
isNull(-1); // false
isNull(-42); // false
isNull(-3e8); // false
isNull(Number.MIN_SAFE_INTEGER); // false
isNull(Number.NEGATIVE_INFINITY); // false
isNull(Number.NaN); // false

// POJOs
isNull({}); // false
isNull({ key: 'string' }); // false
isNull({ key: 123 }); // false

// Promise
isNull(new Promise(() => {})); // false
isNull(new Promise.all([])); // false
isNull(new Promise.allSettled([])); // false
isNull(new Promise.race([])); // false
isNull(Promise.resolve()); // false

// Regular Expression
isNull(/[regex]+/gi); // false
isNull(new RegExp('d', 'gi')); // false

// Sets
isNull(new Set()); // false
isNull(new Set([1, 2, 3])); // false
isNull(new Set(['a', 'b', 'c'])); // false

// Strings
isNull(''); // false
isNull('a longer string'); // false
isNull('1000n'); // false
isNull('3e8'); // false
isNull('42'); // false
isNull('3.14'); // false
isNull('0'); // false
isNull('-0'); // false
isNull('-3.14'); // false
isNull('-42'); // false
isNull('-3e8'); // false
isNull('-1000n'); // false

// Symbols
isNull(Symbol()); // false
isNull(Symbol('name')); // false

// This
isNull(this); // false
isNull(globalThis); // false

// TypedArrays
isNull(new Int8Array(2)); // false
isNull(new Int16Array(2)); // false
isNull(new Int32Array(2)); // false
isNull(new Uint8Array(2)); // false
isNull(new Uint16Array(2)); // false
isNull(new Uint32Array(2)); // false
isNull(new Uint8ClampedArray(2)); // false

isNull(new BigInt64Array(2)); // false
isNull(new BigUint64Array(2)); // false

isNull(new Float32Array(2)); // false
isNull(new Float64Array(2)); // false

isNull(new SharedArrayBuffer(512)); // false

// WeakMap and WeakSet
isNull(new WeakMap()); // false
isNull(new WeakSet()); // false

ZeroDep Advantages

  • Zero npm dependencies - completely eliminates all risk of supply-chain attacks, decreases node_modules folder size
  • ESM & CJS - has both ecmascript modules and common javascript exports
  • Tree Shakable - built to be fully tree shakable ensuring your packages are the smallest possible size
  • Fully typed - typescript definitions are provided for every package for a better developer experience
  • Semantically named - package and method names are easy to grok, remember, use, and read
  • Documented - actually useful documentation with examples at zerodep.app
  • Intelligently Packaged - multiple npm packages of different sizes available allowing a menu or a-la-carte composition of capabilities
  • 100% Tested - all methods and packages are fully unit tested
  • Predictably Versioned - semantically versioned for peace-of-mind upgrading, this includes changelogs
  • MIT Licensed - permissively licensed for maximum usability