'no-undef' not working with a specific variable name.

In my project, the ‘no-undef’ rule has worked fine for months, yesterday I noticed that this rule doesn’t work for the variable ‘Request’ which I use often in my project. As you can see, eslint detects that someOtherVariable is not declared, while ignoring Request. I checked on eslint-cli, atom linter, same thing. This is my config, am I doing something wrong?

module.exports = {
  'parserOptions': {
    'ecmaVersion': 8
  },
  rules: {
    camelcase: 0,
    'comma-dangle': [2, 'never'],
    'comma-spacing': [2, {
      before: false,
      after: true
    }],
    'arrow-spacing': [2, { before: true, after: true }],
    'array-bracket-spacing': 1,
    'consistent-return': 0,
    curly: 0,
    'default-case': 0,
    eqeqeq: [2, 'smart'],
    'func-names': 0,
    'guard-for-in': 2,
    indent: [2, 2, {
      SwitchCase: 1
    }],
    'key-spacing': [2, {
      beforeColon: false,
      afterColon: true
    }],
    'keyword-spacing': [2, {
      before: true,
      after: true
    }],
    'max-len': 0,
    'new-cap': [2, {
      newIsCapExceptions: ['acl.memoryBackend', 'acl', 'mongoose', 'mongoose.Schema', 'mongoose.Types.ObjectId', 'mongodbBackend'],
      capIsNewExceptions: ['Schema', 'mongoose.Schema', 'ValidateSecretKey', 'mongoose.Types.ObjectId', 'Server', 'MongooseHistoryPlugin', 'MongodbMixin', 'ExcelWriterMixin']
    }],
    'no-bitwise': 0,
    'no-caller': 2,
    'no-console': 0,
    'no-else-return': 0,
    'no-empty-class': 0,
    'no-multi-spaces': 2,
    'no-param-reassign': 0,
    'no-shadow': 0,
    'no-spaced-func': 2,
    'no-throw-literal': 2,
    'no-trailing-spaces': 2,
    'no-undef': 2,
    'no-unneeded-ternary': 2,
    'no-unreachable': 2,
    'no-underscore-dangle': 0,
    'no-unused-expressions': 0,
    'no-unused-vars': 0,
    'no-use-before-define': [1, 'nofunc'],
    'no-var': 0,
    'object-curly-spacing': [2, 'always'],
    'one-var': [0, 'never'],
    'one-var-declaration-per-line': [2, 'always'],
    'padded-blocks': 0,
    'space-before-blocks': 1,
    'space-before-function-paren': 1,
    'space-infix-ops': 2,
    'space-in-parens': [2, 'never'],
    'spaced-comment': [2, 'always'],
    strict: 0,
    'quote-props': 0,
    quotes: [1, 'single'],
    'wrap-iife': [2, 'outside'],
    'vars-on-top': 0
  },
  env: {
    node: true,
    browser: true,
    jasmine: true,
    mocha: true,
    jquery: true
  },
  globals: {
    $: true,
    ga: true,
    angular: true,
    by: true,
    browser: true,
    element: true,
    inject: true,
    io: true,
    moment: true,
    Modernizr: true,
    Promise: true,
    __TESTING__: true,
    _: false,
    ApplicationConfiguration: true
  }
};

[galvarez421]

Is this because you have browser environment enabled and Request is a browser global? https://developer.mozilla.org/en-US/docs/Web/API/Request

[jeron-diovis]

Yes, it helps indeed. Thanks!