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

@geronimus/resolve-type-name

v0.1.5

Published

Resolves the type name of a value using both ECMAScript's primitive and extended type systems.

Downloads

2

Readme

resolveTypeName

Gives the name of the type of a value, whether that type is a primitive, an object literal, or an object returned by a constructor function.

  • If the value is a primitive type (eg, boolean, number, string ), then it returns the name of that type.

  • If the value is null, then it returns the text null.

  • If the value is a function, then it returns the text function.

  • If the value was defined as an object literal, then it returns the text object.

  • If the value is an object defined with a constructor function (eg, new Date()), then it returns the name of the constructor (eg, "Date").

However, BEWARE!!!

This function is intended primarily to construct meaningful error and log messages during the development phase of a project.

It is not intended for use in program logic, and certainly never to produce any user-facing content.

The reason is that - for objects created using a constructor function - the value returned is the value of Object.prototype.constructor.name. If your code gets minified, then the constructor function's original name will be replaced by a shortened, unrecognizable, and potentially randomized name.

This means that this function:

  • Should never be used to determine the type of a user-defined object in program logic. (Use the instanceof operator instead.)
  • Will likely be unhelpful for production logging, and should not be used to produce error messages that may become visible to the end user.

Example

const resolveTypeName = require( "@geronimus/resolve-type-name" );

function resolveTypeName( undefined ); \\ => "undefined"
function resolveTypeName( true ); \\ => "boolean"
function resolveTypeName( 1 ); \\ => "number"
function resolveTypeName( "text" ); \\ => "string"
function resolveTypeName( null ); \\ => "null"
function resolveTypeName( () => {} ); \\ => "function"
function resolveTypeName( {} ); \\ => "object"
function resolveTypeName( new Date() ); \\ => "Date"