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

es-iterator-helpers

v1.2.0

Published

An ESnext spec-compliant iterator helpers shim/polyfill/replacement that works as far down as ES3.

Downloads

59,274,659

Readme

es-iterator-helpers Version Badge

github actions coverage License Downloads

npm badge

An ESnext spec-compliant sync iterator helpers shim/polyfill/replacement that works as far down as ES3.

This package implements the es-shim API “multi” interface. It works in an ES3-supported environment and complies with the iterator helpers spec and the iterator sequencing spec.

Because the Iterator.prototype methods depend on a receiver (the this value), the main export in each subdirectory takes the iterator to operate on as the first argument.

The main export of the package itself is simply an array of the available directory names. It’s sole intended use is for build tooling and testing.

Supported things

Environments where this is needed

  • node v22, Chrome >= v122: has a bug
  • node < v22, Chrome < v122, Safari <= v17.1, Firefox <= v125: not implemented
  • all environments lack Iterator.concat

Getting started

npm install --save es-iterator-helpers

Usage/Examples

Using explicit imports:

const map = require('es-iterator-helpers/Iterator.prototype.map');
const toArray = require('es-iterator-helpers/Iterator.prototype.toArray');
const assert = require('assert');

const iterator = [1, 2, 3].values();

const mapped = map(iterator, (x) => x + 10);
assert.deepEqual(
	mapped.next(),
    {
        done: false,
        value: 11,
    }
);
assert.deepEqual(
    toArray(mapped),
    [12, 13]
);

Shim using require:

require('es-iterator-helpers/auto'); // shim all of the methods

require('es-iterator-helpers/Iterator.prototype.map/auto'); // shim the “map” method

Shim using import syntax:

import 'es-iterator-helpers/auto'; // shim all of the methods

import 'es-iterator-helpers/Iterator.prototype.map/auto'; // shim the “map” method

Tests

Simply clone the repo, npm install, and run npm test