🆚 Polyfill vs. Zepto

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

It was originally owned by the Financial Times web team, then moved under community management, and 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 and Fastly.

Zepto is a lightweight and modular open-source JavaScript library with a largely jQuery-compatible API, designed for modern browsers and optimized for fast execution and small file size.

It provides modules for DOM manipulation, event handling, Ajax and JSONP requests, and simple animation effects, supports a chainable API similar to jQuery, and can be customized through a modular build system that includes only the required components for a project.

Popularity

Determined by the number of sites using each technology.

• 🥈 Second most popular in Russia in the JavaScript Libraries category.
• 🥈 Second most popular in Belarus 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.
• 🥉 Third most popular in Belgium in the JavaScript Libraries category.

• ⬆️ 96th most popular in China in the JavaScript Libraries category.
• ⬆️ 236th most popular in the United States in the JavaScript Libraries category.

Top sites

Top-ranked sites that use these technologies.

Compare alternatives

Technologies with similar characteristics.

• Polyfill vs. Modernizr
• Polyfill vs. Regenerator
• Polyfill vs. Core-js
• Polyfill vs. Fastly Polyfill
• Polyfill vs. Babel

• Zepto vs. jQuery
• Zepto vs. React
• Zepto vs. Animate On Scroll
• Zepto vs. MooTools
• Zepto vs. Prototype

• Polyfill technology profile

• Zepto technology profile