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Bump eslint from 8.57.1 to 9.39.4 #70

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Bump eslint from 8.57.1 to 9.39.4 #70

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2 changes: 1 addition & 1 deletion package.json
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Original file line number Diff line number Diff line change
Expand Up @@ -11,7 +11,7 @@
"path": "^0.12.7"
},
"devDependencies": {
"eslint": "^8.57.0",
"eslint": "^9.39.4",
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@rtibblesbot rtibblesbot Apr 30, 2026

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blocking: ESLint 9 replaces the legacy config system (.eslintrc.*) with flat config (eslint.config.js). The project's .eslintrc.js will be silently ignored after this upgrade, leaving npm run lint a no-op — no rules enforced.

To fix, add an eslint.config.js at the repo root and remove .eslintrc.js. See the migration guide. A starting point for this project:

import js from "@eslint/js";
import globals from "globals";
import eslintConfigPrettier from "eslint-config-prettier";

export default [
  js.configs.recommended,
  eslintConfigPrettier,
  {
    languageOptions: {
      ecmaVersion: 2020,
      sourceType: "module",
      globals: { ...globals.browser, ...globals.node },
    },
    rules: {
      "comma-style": "error",
      "no-console": "error",
      "max-len": ["error", 100, {
        ignoreStrings: true,
        ignoreTemplateLiterals: true,
        ignoreUrls: true,
        ignoreTrailingComments: true,
      }],
    },
  },
];

Add globals as a dev dependency: yarn add -D globals.

"eslint-config-prettier": "^10.1.8",
"prettier": "^3.8.1"
}
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