.eslintrc.js

module.exports = {
    root: true,
    parserOptions: {
        parser: 'babel-eslint',
        sourceType: 'module'
    },
    env: {
        browser: true,
        node: true,
        jest: true,
        es6: true
    },
    extends: [
        // 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.
        'plugin:vue/essential',
        // https://github.com/standard/standard/blob/master/docs/RULES-en.md
        'standard',
        'eslint:recommended'
    ],
    // required to lint *.vue files
    plugins: [
        'vue',
        'html'
    ],
    // check if imports actually resolve
    settings: {
        'import/resolver': {
            webpack: {
                config: 'build/webpack.base.conf.js'
            }
        }
    },
    // add your custom rules here
    // it is base on https://github.com/vuejs/eslint-config-vue
    rules: {
        'accessor-pairs': 2,
        'arrow-spacing': [
            2,
            {
                before: true,
                after: true
            }
        ],
        'block-spacing': [2, 'always'],
        'brace-style': [
            2,
            '1tbs',
            {
                allowSingleLine: true
            }
        ],
        camelcase: [
            0,
            {
                properties: 'always'
            }
        ],
        'comma-dangle': [2, 'never'],
        'comma-spacing': [
            2,
            {
                before: false,
                after: true
            }
        ],
        'comma-style': [2, 'last'],
        'constructor-super': 2,
        curly: [2, 'multi-line'],
        'dot-location': [2, 'property'],
        'eol-last': 2,
        eqeqeq: [2, 'allow-null'],
        'generator-star-spacing': [
            2,
            {
                before: true,
                after: true
            }
        ],
        'handle-callback-err': [2, '^(err|error)$'],
        'jsx-quotes': [2, 'prefer-single'],
        'key-spacing': [
            2,
            {
                beforeColon: false,
                afterColon: true
            }
        ],
        'keyword-spacing': [
            2,
            {
                before: true,
                after: true
            }
        ],
        'new-cap': [
            2,
            {
                newIsCap: true,
                capIsNew: false
            }
        ],
        'new-parens': 2,
        'no-array-constructor': 2,
        'no-caller': 2,
        'no-console': 'off',
        'no-class-assign': 2,
        'no-cond-assign': 2,
        'no-const-assign': 2,
        'no-control-regex': 0,
        'no-delete-var': 2,
        'no-dupe-args': 2,
        'no-dupe-class-members': 2,
        'no-dupe-keys': 2,
        'no-duplicate-case': 2,
        'no-empty-character-class': 2,
        'no-empty-pattern': 2,
        'no-eval': 2,
        'no-ex-assign': 2,
        'no-extend-native': 2,
        'no-extra-bind': 2,
        'no-extra-boolean-cast': 2,
        'no-extra-parens': [2, 'functions'],
        'no-fallthrough': 2,
        'no-floating-decimal': 2,
        'no-func-assign': 2,
        'no-implied-eval': 2,
        'no-inner-declarations': [2, 'functions'],
        'no-invalid-regexp': 2,
        'no-irregular-whitespace': 2,
        'no-iterator': 2,
        'no-label-var': 2,
        'no-labels': [
            2,
            {
                allowLoop: false,
                allowSwitch: false
            }
        ],
        'no-lone-blocks': 2,
        'no-mixed-spaces-and-tabs': 2,
        'no-multi-spaces': 2,
        'no-multi-str': 2,
        'no-multiple-empty-lines': [
            2,
            {
                max: 1
            }
        ],
        'no-native-reassign': 2,
        'no-negated-in-lhs': 2,
        'no-new-object': 2,
        'no-new-require': 2,
        'no-new-symbol': 2,
        'no-new-wrappers': 2,
        'no-obj-calls': 2,
        'no-octal': 2,
        'no-octal-escape': 2,
        'no-path-concat': 2,
        'no-proto': 2,
        'no-redeclare': 2,
        'no-regex-spaces': 2,
        'no-return-assign': [2, 'except-parens'],
        'no-self-assign': 2,
        'no-self-compare': 2,
        'no-sequences': 2,
        'no-shadow-restricted-names': 2,
        'no-spaced-func': 2,
        'no-sparse-arrays': 2,
        'no-this-before-super': 2,
        'no-throw-literal': 2,
        'no-trailing-spaces': 2,
        'no-undef': 2,
        'no-undef-init': 2,
        'no-unexpected-multiline': 2,
        'no-unmodified-loop-condition': 2,
        'no-unneeded-ternary': [
            2,
            {
                defaultAssignment: false
            }
        ],
        'no-unreachable': 2,
        'no-unsafe-finally': 2,
        'no-unused-vars': [
            2,
            {
                vars: 'all',
                args: 'none'
            }
        ],
        'no-useless-call': 2,
        'no-useless-computed-key': 2,
        'no-useless-constructor': 2,
        'no-useless-escape': 0,
        'no-whitespace-before-property': 2,
        'no-with': 2,
        'one-var': [
            2,
            {
                initialized: 'never'
            }
        ],
        'operator-linebreak': [
            2,
            'after',
            {
                overrides: {
                    '?': 'before',
                    ':': 'before'
                }
            }
        ],
        'padded-blocks': [2, 'never'],
        quotes: [
            2,
            'single',
            {
                avoidEscape: true,
                allowTemplateLiterals: true
            }
        ],
        semi: [2, 'never'],
        'semi-spacing': [
            2,
            {
                before: false,
                after: true
            }
        ],
        'space-before-blocks': [2, 'always'],
        'space-before-function-paren': 'off',
        'space-in-parens': [2, 'never'],
        'space-infix-ops': 2,
        'space-unary-ops': [
            2,
            {
                words: true,
                nonwords: false
            }
        ],
        'spaced-comment': [
            2,
            'always',
            {
                markers: ['global', 'globals', 'eslint', 'eslint-disable', '*package', '!', ',']
            }
        ],
        'template-curly-spacing': [2, 'never'],
        'use-isnan': 2,
        'valid-typeof': 2,
        'wrap-iife': [2, 'any'],
        'yield-star-spacing': [2, 'both'],
        yoda: [2, 'never'],
        'prefer-const': 2,
        'no-debugger': process.env.NODE_ENV === 'production' ? 2 : 0,
        'object-curly-spacing': [
            2,
            'always',
            {
                objectsInObjects: false
            }
        ],
        'array-bracket-spacing': [2, 'never']
    }
};