🆚 css-vars-ponyfill vs. Polyfill

Client-side support for CSS custom properties (aka "CSS variables") in legacy and modern browsers.

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.

Popularity

Determined by the number of sites using each technology.

• ⬆️ 78th most popular in Austria in the JavaScript Libraries category.
• ⬆️ 84th most popular in New Zealand in the JavaScript Libraries category.
• ⬆️ 88th most popular in Finland in the JavaScript Libraries category.
• ⬆️ 99th most popular in Canada in the JavaScript Libraries category.
• ⬆️ 102nd most popular in Denmark 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.

Top sites

Top-ranked sites that use these technologies.

Compare alternatives

Technologies with similar characteristics.

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• css-vars-ponyfill vs. Enquire.js
• css-vars-ponyfill vs. Animsition
• css-vars-ponyfill vs. Beasties

• Polyfill vs. Regenerator
• Polyfill vs. Core-js
• Polyfill vs. Fastly Polyfill
• Polyfill vs. Babel
• Polyfill vs. ES6 Shim

• css-vars-ponyfill technology profile

• Polyfill technology profile