Core-js

Core-js is a modular standard library for JavaScript that provides polyfills for ECMAScript up to 2024: promises, symbols, collections, iterators, typed arrays, and proposals.

According to our data, Core-js ranks 45th among the JavaScript libraries we track.
It has 1.3% of the JavaScript library market share and is detected on 1% of all websites.

It appears on 1.6% of all websites in Canada, 1.6% in Brazil, and 1.4% in the United States.

Statistics based on 4M+ analyzed websites. About this data

💸 Pricing

Core-js is available for free.

Free ✔️ Open source

📊 Rankings and Market Share

🏆 Core-Js Awards

⚡ Sites Using Core-Js

We have data on 38,873 websites that use the Core-js JavaScript library. Here is a list of some of the top ranked ones.

The highest rated site using Core-js is reddit.com.

#WebsiteRankCountryLanguage
1 reddit.com #46 United States American English
2 mail.ru #119 Russia Russian
3 bestbuy.com #416 United States English
4 flashscore.com.ng #499 Malta English
5 flashscore.fr #503 Czech Republic French
6 flashscore.com #653 Czech Republic English
7 diretta.it #697 Czech Republic Italian
8 smh.com.au #748 Australia English
9 dmac-solutions.net #750 United States English
10 wiki.gg #1,070 English
11 theage.com.au #1,429 Australia English
12 wix.com #1,475 Israel English
13 rainews.it #1,820 Italy Italian
14 mixi.jp #2,000 Japan Japanese
15 raiplay.it #2,075 Italy Italian
16 snai.it #2,117 Italy Italian
17 paciolan.com #2,207 United States English
18 next.co.uk #2,278 United Kingdom British English
19 visualcapitalist.com #2,290 Canada American English
20 nespresso.com #2,327 Switzerland English

📈 Usage Statistics

Most of the sites that use Core-js:

Most of the sites using Core-js are from the United States, the United Kingdom, and Japan.

  • United States 31.2%
  • United Kingdom 7.3%
  • Japan 5.4%
  • Germany 4.8%
  • Canada 4.3%
  • Brazil 4%
  • Australia 3.7%
  • France 2.9%
  • India 2.2%
  • Other 34.2%

Most Core-js users speak English, German, or Japanese.

  • English 67.8%
  • German 5.4%
  • Japanese 4.2%
  • Spanish 4%
  • French 3.7%
  • Portuguese 3.7%
  • Italian 1.4%
  • Russian 1.2%
  • Dutch 1.1%
  • Other 7.5%

The Core-js JavaScript library is especially popular on .com and .org top-level domains.

  • .com 50.8%
  • .org 10.5%
  • .co.uk 2.8%
  • .de 2.5%
  • .com.br 2.4%
  • .net 2.2%
  • .com.au 2%
  • .ca 1.6%
  • .ch 1.3%
  • Other 23.9%

The primary market segments for websites utilizing Core-js include business, marketing and merchandising, and blogs and wiki.

  • Business 17.1%
  • Marketing/Merchandising 13.8%
  • Blogs/Wiki 7.3%
  • Education/Reference 5.6%
  • Entertainment 5.2%
  • Online Shopping 4.4%
  • Sports 4.3%
  • Travel 4.1%
  • Non-Profit/Advocacy/NGO 4.1%
  • Other 34.1%

🔢 Core-Js Versions

The most popular version of Core-Js is 3.2, used by 98.6% of sites where versions were detected. In addition, 0.7% of sites use Core-Js 2.4, and 0.1% use Core-Js 2.6.

  • 3.2 98.6%
  • 2.4 0.7%
  • 2.6 0.1%
  • 3.28 0.08%
  • 3.6 0.07%
  • 2.5 0.07%
  • 3.1 0.06%
  • 3.21 0.05%
  • 3.16 0.03%
  • Other 0.2%

🕵️ Similar Technologies

These are some of the best Core-js alternatives.

RankName
5
Polyfill
London, United Kingdom

An open-source JavaScript library that provides modern web API features to older browsers that do not natively support them.

FreeOpen source
11
Modernizr
San Francisco, California, United States

An open-source feature detection library that identifies browser support for HTML, CSS, and JavaScript features and allows websites to adapt accordingly.

FreeOpen source
39
Regenerator
Menlo Park, California, United States

A JavaScript library from Facebook that allows the use of ES6 generators in older browsers.

FreeOpen source
111
Babel
United States

A JavaScript compiler mainly used to convert ECMAScript 2015+ (ES6) code into an older JavaScript (ES5) version to maximize browser compatibility.

FreeOpen source
117
Fastly Polyfill

A service that reads the User-Agent header of each request and returns polyfills appropriate for the requesting browser.

FreeOpen source

🆚 Compare Alternatives

Compare Core-js to…

💬 Frequently Asked Questions

Is Core-js free?

Yes, it is a free JavaScript library.

Which country uses Core-js the most?

The majority of Core-js users are from the United States.

Who uses Core-js?

According to our data, Core-js is used on thousands of sites, including such established ones as reddit.com, mail.ru, and bestbuy.com.

Is Core-js used on government websites?

In total, we found Core-js on 30 government sites in the United States.

Do academic institutions use Core-js?

Yes. Overall, we know of 35 academic websites in the United States that use Core-js.

How does Core-js compare to its competitors?

Core-js is a fairly popular JavaScript library, ranking ahead of 272 other JavaScript libraries we track.

What are the alternatives to Core-js?

Alternatives and possible competitors to Core-js may include Regenerator, Babel, and Fastly Polyfill.

🗃️ About This Data