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TypeError: Cannot read property 'language' of undefined

See original GitHub issue

When I execute with eslint command, I can run normally

./node_modules/.bin/eslint XXX.jsx

I use the atom editor, eslint can also run the right

But when I use eslint plug-in, the console is wrong, the error message is as follows:

[Info  - 4:47:34 PM] ESLint server is running.
[Info  - 4:47:36 PM] ESLint library loaded from: /Users/liyi/Workspace/ws_ai_mdp/ai-mdp-web/node_modules/eslint/lib/api.js
[Error - 4:47:36 PM] ESLint stack trace:
[Error - 4:47:36 PM] TypeError: Cannot read property 'language' of undefined
    at Object.keys.forEach.key (/Users/liyi/Workspace/ws_ai_mdp/ai-mdp-web/node_modules/eslint/lib/config/config-ops.js:180:75)
    at Array.forEach (native)
    at deepmerge (/Users/liyi/Workspace/ws_ai_mdp/ai-mdp-web/node_modules/eslint/lib/config/config-ops.js:177:30)
    at Object.keys.forEach (/Users/liyi/Workspace/ws_ai_mdp/ai-mdp-web/node_modules/eslint/lib/config/config-ops.js:159:34)
    at Array.forEach (native)
    at deepmerge (/Users/liyi/Workspace/ws_ai_mdp/ai-mdp-web/node_modules/eslint/lib/config/config-ops.js:150:38)
    at Object.keys.forEach.key (/Users/liyi/Workspace/ws_ai_mdp/ai-mdp-web/node_modules/eslint/lib/config/config-ops.js:181:32)
    at Array.forEach (native)
    at Object.deepmerge [as merge] (/Users/liyi/Workspace/ws_ai_mdp/ai-mdp-web/node_modules/eslint/lib/config/config-ops.js:177:30)
    at Config.getConfig (/Users/liyi/Workspace/ws_ai_mdp/ai-mdp-web/node_modules/eslint/lib/config.js:341:28)

My eslint configuration file “.eslintrc.json ” is as follows:

{
    "parser": "babel-eslint",
    "parserOptions": {
        "ecmaVersion": 6,
        "sourceType": "module",
        "ecmaFeatures": {
            "jsx": true,
            "impliedStrict":true
        }
    },
    "extends": [
        "eslint:recommended"
    ],
    "plugins": [
        "react"
    ],
    "env": {
        "browser": true,
        "commonjs": true,
        "es6": true
    }
}

The eslint plug-in version number of my vscode editor is 1.4.8 The dependencies configured in package.json are as follows：

{
  "devDependencies": {
    "autoprefixer": "7.1.6",
    "babel-core": "^6.26.0",
    "babel-eslint": "^8.2.2",
    "babel-loader": "^7.1.4",
    "babel-plugin-import": "^1.6.7",
    "babel-plugin-transform-decorators-legacy": "^1.3.4",
    "babel-preset-react-app": "^3.1.1",
    "babel-runtime": "^6.26.0",
    "eslint": "^4.19.1",
    "eslint-config-airbnb": "^16.1.0",
    "eslint-plugin-html": "^4.0.2",
    "eslint-plugin-import": "^2.10.0",
    "eslint-plugin-jsx-a11y": "^6.0.3",
    "eslint-plugin-react": "^7.7.0",
   }
}

Issue Analytics

State:
Created 5 years ago
Reactions:1
Comments:22 (12 by maintainers)

Top GitHub Comments

1reaction

JonWallstencommented, Apr 12, 2018

So, it turns out that uninstalling an extension is not actually removing it in the extension folder. So when you install again, it still the same old files. I removed eslint and stylelint and installed both again. Voila! No error! Thanks guys!

0reactions

JonWallstencommented, Apr 13, 2018

@alexandrudima @sandy081: Just an FYI. I did press the “Restart” button between uninstall and install. Good to know there’s a Reinstall. Will use that next time. Thanks again!