Feat: sort-keys rule

[RobertAKARobin]

Environment

ESLint version: 9.17.0
@eslint/json version: 0.9.0
Node version: 20.11.0
npm version: 10.8.2
Operating System: macOS 15.1

Which language are you using?

json

What did you do?

Configuration

import json from '@eslint/json';

const sortKeys = {
	'sort-keys': [`error`, `asc`, {
		allowLineSeparatedGroups: true,
	}],
};

export default [
	{
		files: [`index.js`],
		rules: sortKeys,
	},

	{
		files: [`index.json`],
		language: `json/json`,
		plugins: {
			json,
		},
		rules: sortKeys,
	}
];

index.js

An error for sort-keys is thrown in this file as expected:

export default {
	"bbb": "bbb",
	"aaa": "aaa"
};

index.json

No sort-keys error is thrown in this file:

{
	"bbb": "bbb",
	"aaa": "aaa"
}

What did you expect to happen?

I expected a sort-keys error to be thrown because the JSON object's keys were not in alphabetical order.

What actually happened?

A sort-keys error was not thrown.

Link to Minimal Reproducible Example

https://stackblitz.com/edit/stackblitz-starters-pauaycvs?file=eslint.config.js

Participation

• I am willing to submit a pull request for this issue.

Additional comments

https://eslint.org/docs/latest/rules/sort-keys

[nzakas]

sort-keys is a JavaScript-specific rule, so it can't work with JSON. We'd have to recreate a JSON-specific one.

[haenah]

There's little to be changed from existing sort-keys rule in eslint to implement the rule for json, so I'm planning to implement and request PR sooner.

[RobertAKARobin]

@haenah Actually I'm working on it now. Will submit soon.