.eslintrc.js

// https://eslint.org/docs/user-guide/configuring

module.exports = {
  root: true,
  parserOptions: {
    parser: 'babel-eslint'
  },
  env: {
    browser: true,
  },
  // https://github.com/vuejs/eslint-plugin-vue#priority-a-essential-error-prevention
  // consider switching to `plugin:vue/strongly-recommended` or `plugin:vue/recommended` for stricter rules.
  extends: ['plugin:vue/essential', 'airbnb-base'],
  // required to lint *.vue files
  plugins: [
    'vue'
  ],
  // check if imports actually resolve
  settings: {
    'import/resolver': {
      webpack: {
        config: 'build/webpack.base.config.js'
      }
    }
  },
  rules: {
    // disallow reassignment of function parameters
    // disallow parameter object manipulation except for specific exclusions
    'no-param-reassign': ['error', {
      props: true,
      ignorePropertyModificationsFor: [
        'state', // for vuex state
        'acc', // for reduce accumulators
        'e' // for e.returnvalue
      ]
    }],
    // allow optionalDependencies
    'import/no-extraneous-dependencies': ['error', {
      optionalDependencies: ['test/unit/index.js']
    }],
    // allow debugger during development
    'no-debugger': process.env.NODE_ENV === 'production' ? 'error' : 'off',
    // others
    'no-console': 'off',
    'semi': [
      'error',
      'never'
    ],
    'no-new': 'off',
    'comma-dangle': [
      'error',
      'only-multiline'
    ],
    'import/no-webpack-loader-syntax': 'off',
    'import/first': 'off',
    'import/no-unresolved': 'off',
    'linebreak-style': ['off', 'windows'],
  },
  'globals': {
    'window': true,
    'document': true,
    'App': true,
    'Page': true,
    'Component': true,
    'Behavior': true,
    'wx': true,
    'getCurrentPages': true,
  }
}