🆚 Facebook SDK vs. Polyfill
- 📈 Facebook SDK is slightly more popular than Polyfill.
- 🌎 Facebook SDK is more popular in the United States, Japan, and Italy.
- 🌍 Polyfill is more popular in the United Kingdom, Australia, and Spain.
PolyfillType
About
Facebook SDK is a library that provides client-side tools for Social Plugins, Login, and Graph API calls.
It enables loading Social Plugins such as 
Like, Share, or Comments buttons, initiating Facebook Login with configurable permissions, and opening dialogs for sharing, fetching and updating data via Graph API endpoints.
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.
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 Poland in the JavaScript Libraries category.
- 🥈 Second most popular in Vietnam in the JavaScript Libraries category.
- 🥈 Second most popular in Ukraine in the JavaScript Libraries category.
- 🥈 Second most popular in the Czech Republic in the JavaScript Libraries category.
- 🥈 Second most popular in Hungary in the JavaScript Libraries category.
- 🥈 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.
- 🥈 Second most popular in Curacao in the JavaScript Libraries category.
- 🥈 Second most popular in the Turks and Caicos Islands 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.
jQuery
Swiper
ImagesLoaded
X for Websites
LinkedIn Platform
Regenerator
Fastly Polyfill
Babel
Meta company profile🗃️ 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 3,375,483 websites.
- Statistics were last calculated on .
- For more details, see our methodology and disclaimer.