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A port of the WHATWG URL Pattern standard with no external package: the pattern tokenizer and parser, regex and pattern-string generation, the constructor-string parser, and component canonicalization on top of a small WHATWG URL parser (System.Uri is not WHATWG-compliant). Custom regexp groups are translated from JavaScript "v"-flag syntax to .NET Regex. Vendors the WPT urlpatterntestdata.json (BSD-3-Clause) and runs it as a browser-free data-driven test. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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Playwright for Node accepts a
URLPatternwherever it takes a URL matcher, and .NET has nothing like it. This addsPlaywrightNative.URLPattern, a port of the WHATWG URL Pattern standard with no external package: constructors from a pattern string orURLPatternInit, the component getters,HasRegExpGroups,TestandExec.Matching needs WHATWG URL canonicalization, and
System.Uridoes not follow those rules, so a small WHATWG URL parser (hosts, IDNA, IPv4/IPv6, paths, percent-encoding) lives next to it. Custom regexp groups are written in JavaScript "v"-flag syntax and are translated to .NETRegex, keeping JS group numbering.The WPT
urlpatterntestdata.jsonis vendored with its BSD license and runs as a browser-free test: 365 of 369 entries pass. Three entries call the JS API in ways the .NET overloads can't express, and one differs only in an empty optional group reading""instead ofundefined.This is part 1 of 3. Routing and waits/expect wiring follow.
Part of #42, #47, #28
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