@implementjs/eslint

Lint rules for the implement mistakes types cannot catch: a subscription whose unsubscribe went missing, a misspelled aria attribute, a Lifecycle that wanted to be a Watch.

npm install -D @implementjs/eslint

The same package is the plugin for both linters.

oxlint

// oxlint.config.ts
import { defineConfig } from "oxlint";

export default defineConfig({
	jsPlugins: ["@implementjs/eslint"],
	rules: {
		"implementjs/no-hanging-unsubscribe": "error",
		"implementjs/no-signal-condition": "error",
		"implementjs/prefer-foreach": "error",
		"implementjs/valid-aria": "error",
	},
});

ESLint

// eslint.config.ts
import implementjs from "@implementjs/eslint";

export default [implementjs.configs.recommended];

Full documentation: implementjs.dev/eslint