Can relative URLs be parsed?

Use an absolute URL with scheme and host for full breakdown. A bare path?query lacks hostname and related fields.

How are duplicate query keys handled?

Repeated keys list multiple values (tag=a&tag=b)—handy for UTM params or array-style queries.

No. The parser still shows the fragment for SPA routing debug, but HTTP requests omit everything after #.

Parse URL components including protocol, host, path, and query params.

Parse URL components including protocol, host, port, path, query params, and hash.

Can relative URLs be parsed?: Use an absolute URL with scheme and host for full breakdown. A bare path?query lacks hostname and related fields.
How are duplicate query keys handled?: Repeated keys list multiple values (tag=a&tag=b)—handy for UTM params or array-style queries.
Does the hash fragment get sent to servers?: No. The parser still shows the fragment for SPA routing debug, but HTTP requests omit everything after #.