`NextURL` intentionally canonicalizes loopback hosts (127.x.x.x, [::1], localhost) to localhost so that internal URL handling is consistent across equivalent local origins. However, we were applying a regex replacement to the entire URL before parsing, which unintentionally rewrote loopback strings inside query parameter values, eg `?redirect_uri=http%3A%2F%2F127.0.0.1...`. This is unexpected for anyone that is explicitly passing through different loopback values. This fixes it by first parsing the URL with `new URL()`, and then only apply the replacement logic to `parsed.hostname` when it is a loopback host. This leaves search unchanged. Fixes NEXT-4864
Getting Started
Used by some of the world's largest companies, Next.js enables you to create full-stack web applications by extending the latest React features, and integrating powerful Rust-based JavaScript tooling for the fastest builds.
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Documentation
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Good First Issues:
We have a list of good first issues that contain bugs that have a relatively limited scope. This is a great place for newcomers and beginners alike to get started, gain experience, and get familiar with our contribution process.
Security
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