🆚 Core-js vs. Fastly Polyfill
- 📈 Core-js is five times more popular than Fastly Polyfill.
- 🌎 Core-js is more popular in the United States, the United Kingdom, and Japan.
- 🌍 Fastly Polyfill is more popular in Pakistan, Monaco, and Albania.
Statistics based on 3.8M+ analyzed websites. About this data
Core-js
Fastly PolyfillType
JavaScript library
JavaScript library
About
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.
Fastly Polyfill is a service that reads the User-Agent header of each request and returns polyfills appropriate for the requesting browser.
Pricing
Free ✔️ Open source
Free ✔️ Open source
Categories
JavaScript Libraries › Rank #45
JavaScript Libraries › Rank #118
Popularity
Determined by the number of sites using each technology.
The Core-js JavaScript library is 5 times more popular than Fastly Polyfill.
Total websites
Market share
JavaScript Libraries
Popularity by country
Determined by the number of sites detected from each country.
Core-js is more popular in the United States, the United Kingdom, and Japan, while Fastly Polyfill is more popular in Pakistan, Monaco, and Albania.
United States
United Kingdom
Japan
Germany
Canada
Brazil
Australia
France
India
Italy
Awards
- ⬆️ 30th most popular in Israel in the JavaScript Libraries category.
- ⬆️ 36th most popular in the Philippines in the JavaScript Libraries category.
- ⬆️ 37th most popular in Hong Kong in the JavaScript Libraries category.
- ⬆️ 38th most popular in Brazil in the JavaScript Libraries category.
- ⬆️ 38th most popular in Mexico in the JavaScript Libraries category.
- ⬆️ 87th most popular in Canada in the JavaScript Libraries category.
- ⬆️ 91st most popular in Sweden in the JavaScript Libraries category.
- ⬆️ 94th most popular in Australia in the JavaScript Libraries category.
- ⬆️ 96th most popular in Denmark in the JavaScript Libraries category.
- ⬆️ 98th most popular in Ireland in the JavaScript Libraries category.
Popularity by domain category
Determined by the number of sites in each category.
Core-js is more popular among sites focused on business, marketing and merchandising, and blogs and wiki, while Fastly Polyfill is more commonly used on online shopping, fashion and beauty, and general news sites.
Business
Marketing/Merchandising
Online Shopping
Blogs/Wiki
Education/Reference
Entertainment
Sports
Travel
Health
Non-Profit/Advocacy/NGO
Top sites
Top-ranked sites that use these technologies.
Compare alternatives
Technologies with similar characteristics.
🗃️ About This Data
- We evaluate the popularity of technologies based on the number of websites where we detect their usage.
- Technologies without a detectable web footprint, and those we do not track, are not reflected in the calculated market share.
- This report is based on the analysis of 3,814,833 websites.
- Statistics were last calculated on .
- For more details, see our methodology and disclaimer.