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 50th among the JavaScript libraries we track.
It has 1.1% of the JavaScript library market share and is detected on 0.8% of all websites.

Statistics based on 3.6M+ 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 29,821 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 #25 United States American English
2 sciencedirect.com #75 United Kingdom American English
3 mail.ru #123 Russia Russian
4 bestbuy.com #254 United States English
5 flashscore.fr #480 Czech Republic French
6 flashscore.com #565 Czech Republic English
7 diretta.it #687 Czech Republic Italian
8 jaya9bangladesh.com #907 Bangladesh English
9 teamviewer.com #1,139 Germany English
10 wiki.gg #1,184 English
11 wix.com #1,300 Israel English
12 visualcapitalist.com #1,389 Canada American English
13 newegg.com #1,476 United States American English
14 smh.com.au #1,536 Australia English
15 oregon.gov #1,617 United States American English
16 raiplay.it #1,711 Italy Italian
17 nespresso.com #1,826 Switzerland English
18 next.co.uk #2,092 United Kingdom British English
19 mixi.jp #2,229 Japan Japanese
20 groww.in #2,307 India 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 29.4%
  • United Kingdom 7.8%
  • Japan 5.1%
  • Germany 4.7%
  • Canada 4.4%
  • Brazil 4.2%
  • Australia 3.8%
  • France 3.6%
  • India 2.4%
  • Other 34.6%

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

  • English 69%
  • German 5%
  • Spanish 4%
  • Japanese 3.8%
  • French 3.6%
  • Portuguese 3.6%
  • Italian 1.5%
  • Dutch 1.3%
  • Hebrew 1%
  • Other 7.2%

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

  • .com 51.9%
  • .org 10.3%
  • .co.uk 2.9%
  • .de 2.4%
  • .com.br 2.4%
  • .net 2.3%
  • .com.au 2%
  • .ca 1.5%
  • .ch 1.3%
  • Other 23%

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

  • Business 17.3%
  • Marketing/Merchandising 14%
  • Blogs/Wiki 8%
  • Education/Reference 5.7%
  • Entertainment 5.1%
  • Online Shopping 4.1%
  • Sports 4%
  • Restaurants 3.8%
  • Travel 3.7%
  • Other 34.3%

🔢 Core-Js Versions

The most popular version of Core-Js is 3.2, used by 98.2% of sites where versions were detected. In addition, 0.8% of sites use Core-Js 2.4, and 0.2% use Core-Js 2.6.

  • 3.2 98.2%
  • 2.4 0.8%
  • 2.6 0.2%
  • 2.5 0.09%
  • 3.28 0.08%
  • 3.6 0.08%
  • 3.1 0.07%
  • 3.21 0.06%
  • 3.16 0.04%
  • Other 0.4%

🕵️ Similar Technologies

These are some of the best Core-js alternatives.

RankName
4
Polyfill

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

FreeOpen source
12
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
23
Regenerator
Menlo Park, California, United States

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

FreeOpen source
101
Fastly Polyfill

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

FreeOpen source
118
Babel

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

FreeOpen source

🆚 Compare Alternatives

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💬 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, sciencedirect.com, and mail.ru.

Is Core-js used on government websites?

Yes, for example, it is used by oregon.gov. In total, we found Core-js on 23 government sites in the United States.

Do academic institutions use Core-js?

Yes. Overall, we know of 21 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 262 other JavaScript libraries we track.

What are the alternatives to Core-js?

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

🗃️ About This Data