🆚 Polyfill vs. X for Websites
- 📈 Polyfill is much more popular than X for Websites.
- 🌎 Polyfill is more popular in the United States, Japan, and the United Kingdom.
- 🌍 X for Websites is more popular in Mongolia, Rwanda, and Burundi.
Polyfill
X for WebsitesType
About
Polyfill.io is an open-source 
JavaScript library that provides modern web API features to older browsers that do not natively support them.
After a supply chain attack in 2024 involving its cdn.polyfill.io domain, the service was discontinued and is now safely mirrored and maintained by 
Cloudflare under independent management.
X for Websites is a suite of tools bringing X content and functionality to your webpages and apps, enabling the X audience to share your content, and follow your X accounts.
Headquarters
Pricing
Categories
Popularity
Determined by the number of sites using each technology.
Market share
Popularity by country
Determined by the number of sites detected from each country.
Awards
- 🥈 Second most popular in Russia in the JavaScript Libraries category.
- 🥈 Second most popular in Belarus in the JavaScript Libraries category.
- 🥈 Second most popular in Jamaica in the JavaScript Libraries category.
- 🥉 Third most popular in the Netherlands in the JavaScript Libraries category.
- 🥉 Third most popular in Switzerland in the JavaScript Libraries category.
- ⭐ 7th most popular in Japan in the JavaScript Libraries category.
- 🔥 18th most popular in Uganda in the JavaScript Libraries category.
- ⬆️ 27th most popular in Saudi Arabia in the JavaScript Libraries category.
- ⬆️ 31st most popular in Colombia in the JavaScript Libraries category.
- ⬆️ 33rd most popular in the United Kingdom in the JavaScript Libraries category.
Popularity by domain category
Determined by the number of sites in each category.
Top sites
Top-ranked sites that use these technologies.
Compare alternatives
Technologies with similar characteristics.
Modernizr
Regenerator
Core-js
Fastly Polyfill
Babel
jQuery
Swiper
Facebook SDK
LinkedIn Platform🗃️ 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 3,604,716 websites.
- Statistics were last calculated on .
- For more details, see our methodology and disclaimer.