{
  "manifest": {
    "name": "eslint-visitor-keys",
    "version": "3.4.3",
    "description": "Constants and utilities about visitor keys to traverse AST.",
    "type": "module",
    "main": "dist/eslint-visitor-keys.cjs",
    "types": "./dist/index.d.ts",
    "exports": {
      ".": [
        {
          "import": "./lib/index.js",
          "require": "./dist/eslint-visitor-keys.cjs"
        },
        "./dist/eslint-visitor-keys.cjs"
      ],
      "./package.json": "./package.json"
    },
    "files": [
      "dist/index.d.ts",
      "dist/visitor-keys.d.ts",
      "dist/eslint-visitor-keys.cjs",
      "dist/eslint-visitor-keys.d.cts",
      "lib"
    ],
    "engines": {
      "node": "^12.22.0 || ^14.17.0 || >=16.0.0"
    },
    "devDependencies": {
      "@types/estree": "^0.0.51",
      "@types/estree-jsx": "^0.0.1",
      "@typescript-eslint/parser": "^5.14.0",
      "c8": "^7.11.0",
      "chai": "^4.3.6",
      "eslint": "^7.29.0",
      "eslint-config-eslint": "^7.0.0",
      "eslint-plugin-jsdoc": "^35.4.0",
      "eslint-plugin-node": "^11.1.0",
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      "tsd": "^0.19.1",
      "typescript": "^4.6.2"
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    "scripts": {
      "build": "npm run build:cjs && npm run build:types",
      "build:cjs": "rollup -c",
      "build:debug": "npm run build:cjs -- -m && npm run build:types",
      "build:keys": "node tools/build-keys-from-ts",
      "build:types": "tsc",
      "lint": "eslint .",
      "prepare": "npm run build",
      "release:generate:latest": "eslint-generate-release",
      "release:generate:alpha": "eslint-generate-prerelease alpha",
      "release:generate:beta": "eslint-generate-prerelease beta",
      "release:generate:rc": "eslint-generate-prerelease rc",
      "release:publish": "eslint-publish-release",
      "test": "mocha tests/lib/**/*.cjs && c8 mocha tests/lib/**/*.js && npm run test:types",
      "test:open-coverage": "c8 report --reporter lcov && opener coverage/lcov-report/index.html",
      "test:types": "tsd"
    },
    "repository": {
      "type": "git",
      "url": "https://github.com/eslint/eslint-visitor-keys.git"
    },
    "funding": "https://opencollective.com/eslint",
    "keywords": [],
    "author": {
      "name": "Toru Nagashima",
      "url": "https://github.com/mysticatea"
    },
    "license": "Apache-2.0",
    "bugs": {
      "url": "https://github.com/eslint/eslint-visitor-keys/issues"
    },
    "homepage": "https://github.com/eslint/eslint-visitor-keys#readme",
    "_registry": "npm",
    "_loc": "/home/josie/.cache/yarn/v6/npm-eslint-visitor-keys-3.4.3-integrity/node_modules/eslint-visitor-keys/package.json",
    "readmeFilename": "README.md",
    "readme": "# eslint-visitor-keys\n\n[![npm version](https://img.shields.io/npm/v/eslint-visitor-keys.svg)](https://www.npmjs.com/package/eslint-visitor-keys)\n[![Downloads/month](https://img.shields.io/npm/dm/eslint-visitor-keys.svg)](http://www.npmtrends.com/eslint-visitor-keys)\n[![Build Status](https://github.com/eslint/eslint-visitor-keys/workflows/CI/badge.svg)](https://github.com/eslint/eslint-visitor-keys/actions)\n\nConstants and utilities about visitor keys to traverse AST.\n\n## 💿 Installation\n\nUse [npm] to install.\n\n```bash\n$ npm install eslint-visitor-keys\n```\n\n### Requirements\n\n- [Node.js] `^12.22.0`, `^14.17.0`, or `>=16.0.0`\n\n\n## 📖 Usage\n\nTo use in an ESM file:\n\n```js\nimport * as evk from \"eslint-visitor-keys\"\n```\n\nTo use in a CommonJS file:\n\n```js\nconst evk = require(\"eslint-visitor-keys\")\n```\n\n### evk.KEYS\n\n> type: `{ [type: string]: string[] | undefined }`\n\nVisitor keys. This keys are frozen.\n\nThis is an object. Keys are the type of [ESTree] nodes. Their values are an array of property names which have child nodes.\n\nFor example:\n\n```\nconsole.log(evk.KEYS.AssignmentExpression) // → [\"left\", \"right\"]\n```\n\n### evk.getKeys(node)\n\n> type: `(node: object) => string[]`\n\nGet the visitor keys of a given AST node.\n\nThis is similar to `Object.keys(node)` of ES Standard, but some keys are excluded: `parent`, `leadingComments`, `trailingComments`, and names which start with `_`.\n\nThis will be used to traverse unknown nodes.\n\nFor example:\n\n```js\nconst node = {\n    type: \"AssignmentExpression\",\n    left: { type: \"Identifier\", name: \"foo\" },\n    right: { type: \"Literal\", value: 0 }\n}\nconsole.log(evk.getKeys(node)) // → [\"type\", \"left\", \"right\"]\n```\n\n### evk.unionWith(additionalKeys)\n\n> type: `(additionalKeys: object) => { [type: string]: string[] | undefined }`\n\nMake the union set with `evk.KEYS` and the given keys.\n\n- The order of keys is, `additionalKeys` is at first, then `evk.KEYS` is concatenated after that.\n- It removes duplicated keys as keeping the first one.\n\nFor example:\n\n```js\nconsole.log(evk.unionWith({\n    MethodDefinition: [\"decorators\"]\n})) // → { ..., MethodDefinition: [\"decorators\", \"key\", \"value\"], ... }\n```\n\n## 📰 Change log\n\nSee [GitHub releases](https://github.com/eslint/eslint-visitor-keys/releases).\n\n## 🍻 Contributing\n\nWelcome. See [ESLint contribution guidelines](https://eslint.org/docs/developer-guide/contributing/).\n\n### Development commands\n\n- `npm test` runs tests and measures code coverage.\n- `npm run lint` checks source codes with ESLint.\n- `npm run test:open-coverage` opens the code coverage report of the previous test with your default browser.\n\n\n[npm]: https://www.npmjs.com/\n[Node.js]: https://nodejs.org/\n[ESTree]: https://github.com/estree/estree\n",
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