Polyfill.js
A library that simplifies creating CSS polyfills by handling CSS parsing, media queries, and rule matching boilerplate.
What is Polyfill.js?
Polyfill.js is a JavaScript library that simplifies the creation of CSS polyfills by abstracting away the boilerplate tasks of downloading, parsing, and matching CSS rules, including media query handling. It solves the problem of repetitive, inefficient work in polyfill development by providing a shared infrastructure that performs these tasks once, improving performance and maintainability.
Frontend developers and polyfill authors who need to implement CSS features for browsers that lack native support, particularly those dealing with complex CSS parsing, media queries, and dynamic rule matching.
Developers choose Polyfill.js because it eliminates the tedious, error-prone parts of writing CSS polyfills, offering a streamlined API that handles CSS processing and media query management, reducing code duplication and improving cross-polyfill efficiency.
Overview
A library to make creating CSS polyfills much easier.
Use Cases
Best For
- Creating polyfills for experimental CSS pseudo-classes like :local-link
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