url: URLPattern.exec() result properties are not created in WebIDL order

[Archkon]

Version

latest main branch

Platform

7.1.4-arch1-1

Subsystem

url

What steps will reproduce the bug?

  const { URLPattern } = require('node:url');

  const pattern = new URLPattern({ pathname: '/:value' });
  const result = pattern.exec('https://example.com/test');

  console.log(Object.keys(result));
  console.log(Object.keys(result.pathname));
  console.log(JSON.stringify(result.pathname));

How often does it reproduce? Is there a required condition?

Every

What is the expected behavior? Why is that the expected behavior?

  [
    'hash',
    'hostname',
    'pathname',
    'port',
    'protocol',
    'search',
    'username'
  ]

  [ 'groups', 'input' ]

  '{"groups":{"value":"test"},"input":"/test"}'

What do you see instead?

  [
    'inputs',
    'protocol',
    'username',
    'password',
    'hostname',
    'port',
    'pathname',
    'search',
    'hash'
  ]

  [ 'input', 'groups' ]

  '{"input":"/test","groups":{"value":"test"}}'

Additional information

Although direct property access is unaffected, property creation order is observable through:

  Object.keys(result);
  Object.values(result);
  JSON.stringify(result);
  ({ ...result });

This makes Node.js behavior incompatible with browsers and WebIDL dictionary conversion semantics.