What is urlpattern-polyfill?
The urlpattern-polyfill npm package provides a polyfill for the URLPattern API, which is a web standard for parsing and matching URLs against patterns. It is useful for routing in web applications, validating URLs, and extracting parts of URLs based on a predefined pattern.
What are urlpattern-polyfill's main functionalities?
Parsing and matching URLs
This feature allows you to define a URL pattern and then match URLs against it. If the URL matches, you can extract parts of it, such as path segments or query parameters.
const pattern = new URLPattern({ pathname: '/books/:id' });
const result = pattern.exec('/books/123');
console.log(result.pathname.groups.id); // '123'
Pattern matching with wildcards and modifiers
This feature enables the use of wildcards (*) and other modifiers to create flexible URL patterns that can match a variety of URL structures.
const pattern = new URLPattern({ pathname: '/books/*' });
const isMatch = pattern.test('/books/sci-fi');
console.log(isMatch); // true
Compatibility with the URLPattern API
The polyfill aims to be compatible with the URLPattern API, providing the same methods and properties that would be available in environments where the API is natively supported.
const pattern = new URLPattern('https://example.com/books/:id');
const isCompatible = 'exec' in pattern && 'test' in pattern;
console.log(isCompatible); // true
Other packages similar to urlpattern-polyfill
path-to-regexp
path-to-regexp is a popular package for converting paths to regular expressions. It is widely used in Express.js for route pattern matching. Unlike urlpattern-polyfill, which aims to polyfill a specific web standard, path-to-regexp provides a more general solution for path matching and does not conform to the URLPattern API.
route-recognizer
route-recognizer is a library for matching paths against defined route patterns. It is designed for use with client-side routers. While it serves a similar purpose to urlpattern-polyfill, it has its own API and does not attempt to polyfill the URLPattern API.
url-pattern
url-pattern is a library that makes it easy to match URLs against patterns. It offers similar functionality to urlpattern-polyfill but does not specifically aim to implement the URLPattern API. Instead, it provides its own set of features and API for pattern matching.
URLPattern polyfills
This is a polyfill for the URLPattern and URLPatternList API proposed here
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