.eslintrc.js

module.exports = {
    root: true,
    env: {
        browser: true,
        node: true
    },
    extends: [
        'plugin:vue/base',
        '@vue/standard'
    ],
    globals: {
        document: true,
        navigator: true,
        window: true
    },
    rules: {
        'accessor-pairs': ['error', {getWithoutSet: false}],
        'block-scoped-var': 'error',
        'comma-dangle': ['error', 'never'],
        complexity: ['error', 5],
        'consistent-return': 'error',
        curly: ['error', 'all'],
        'default-case': 'error',
        'dot-location': ['error', 'property'],
        'dot-notation': ['error', {allowKeywords: true}],
        eqeqeq: 'error',
        'guard-for-in': 'error',
        'no-alert': 'error',
        'no-caller': 'error',
        'no-case-declarations': 'error',
        'no-console': 'warn',
        'no-debugger': 'warn',
        'no-div-regex': 'error',
        'no-else-return': 'error',
        'no-empty-pattern': 'error',
        'no-eq-null': 'error',
        'no-eval': 'error',
        'no-extend-native': 'error',
        'no-extra-bind': 'error',
        'no-fallthrough': ['error', {commentPattern: 'falls?\\s?through'}],
        'no-floating-decimal': 'error',
        'no-implied-eval': 'error',
        'no-iterator': 'error',
        'no-labels': ['error', {allowLoop: true}],
        'no-lone-blocks': 'error',
        'no-loop-func': 'error',
        'no-multi-spaces': 'error',
        'no-multi-str': 'error',
        'no-native-reassign': 'error',
        'no-new-wrappers': 'error',
        'no-new': 'error',
        'no-octal': 'error',
        'no-octal-escape': 'error',
        'no-proto': 'error',
        'no-redeclare': 'error',
        'no-return-assign': 'error',
        'no-script-url': 'error',
        'no-self-compare': 'error',
        'no-sequences': 'error',
        'no-throw-literal': 'error',
        'no-unmodified-loop-condition': 'error',
        'no-unused-expressions': ['error', {allowShortCircuit: true, allowTernary: true}],
        'no-useless-call': 'error',
        'no-useless-concat': 'error',
        'no-useless-escape': 'error',
        'no-void': 'error',
        'no-warning-comments': ['warn', {terms: ['fix', 'hack', 'todo', 'xxx'], location: 'anywhere'}],
        'no-with': 'error',
        radix: ['error', 'always'],
        'vars-on-top': 'error',
        'wrap-iife': ['error', 'inside'],

        strict: ['error', 'never'],

        'no-delete-var': 'error',
        'no-label-var': 'error',
        'no-shadow': 'error',
        'no-undef-init': 'error',
        'no-undefined': 'off',
        'no-use-before-define': 'error',

        'sort-imports': ['error', {ignoreDeclarationSort: true}],
        'sort-vars': 'error',
        'array-bracket-spacing': ['error', 'never'],
        'block-spacing': ['error', 'never'],
        'brace-style': ['error', '1tbs', {allowSingleLine: true}],
        camelcase: 'error',
        'comma-spacing': ['error', {before: false, after: true}],
        'comma-style': ['error', 'last'],
        'computed-property-spacing': ['error', 'never'],
        'eol-last': 'error',
        indent: ['error', 4, {SwitchCase: 0}],
        'key-spacing': ['error', {beforeColon: false, afterColon: true}],
        'keyword-spacing': 'error',
        'linebreak-style': ['error', 'unix'],
        'max-depth': ['error', 4],
        'max-len': ['off', 120, 4, {
            ignoreTemplateLiterals: true,
            ignoreUrls: true
        }],
        'max-nested-callbacks': ['error', 3],
        'max-params': ['error', 3],
        'new-cap': 'error',
        'new-parens': 'error',
        'no-array-constructor': 'error',
        'no-implicit-globals': 'error',
        'no-lonely-if': 'error',
        'no-mixed-operators': 'error',
        'no-mixed-spaces-and-tabs': ['error', false],
        'no-multiple-empty-lines': ['error', {max: 2, maxEOF: 1}],
        'no-nested-ternary': 'error',
        'no-new-object': 'error',
        'no-spaced-func': 'error',
        'no-trailing-spaces': 'error',
        'no-unneeded-ternary': 'error',
        'no-whitespace-before-property': 'error',
        'object-curly-spacing': ['error', 'never'],
        'one-var': ['error', 'never'],
        'operator-linebreak': ['error', 'after'],
        'padded-blocks': ['error', {
            blocks: 'never',
            switches: 'never',
            classes: 'always'
        }],
        'padding-line-between-statements': ['error',
            {blankLine: 'always', prev: '*', next: 'return'},
            {blankLine: 'always', prev: ['const', 'let', 'var'], next: '*'},
            {blankLine: 'any', prev: ['const', 'let', 'var'], next: ['const', 'let', 'var']},
            {blankLine: 'always', prev: 'directive', next: '*'},
            {blankLine: 'any', prev: 'directive', next: 'directive'}
        ],
        quotes: ['error', 'single'],
        'semi-spacing': ['error', {before: false, after: true}],
        semi: ['error', 'always'],
        'space-before-blocks': ['error', 'always'],
        'space-before-function-paren': ['error', {anonymous: 'always', named: 'never'}],
        'space-infix-ops': 'error',
        'spaced-comment': ['error', 'always', {exceptions: ['-*']}],
        'space-in-parens': ['error', 'never'],
        'wrap-regex': 'error',

        'arrow-parens': ['error', 'always'],
        'arrow-spacing': 'error',
        'constructor-super': 'error',
        'generator-star-spacing': ['error', {before: true, after: false}],
        'no-async-promise-executor': 'error',
        'no-class-assign': 'error',
        'no-const-assign': 'error',
        'no-dupe-class-members': 'error',
        'no-duplicate-imports': 'error',
        'no-new-symbol': 'error',
        'no-prototype-builtins': 'error',
        'no-useless-catch': 'error',
        'no-this-before-super': 'error',
        'no-useless-computed-key': 'error',
        'no-useless-constructor': 'error',
        'no-useless-rename': 'error',
        'no-var': 'error',
        'prefer-arrow-callback': 'error',
        'prefer-const': ['error', {
            destructuring: 'any',
            ignoreReadBeforeAssign: false
        }],
        'prefer-promise-reject-errors': 'error',
        'prefer-reflect': ['error', {exceptions: ['delete']}],
        'prefer-rest-params': 'error',
        'prefer-spread': 'error',
        'prefer-template': 'error',
        'require-yield': 'error',
        'rest-spread-spacing': ['error', 'never'],
        'symbol-description': 'error',
        'template-curly-spacing': ['error', 'never'],
        'yield-star-spacing': ['error', {before: false, after: true}],

        'vue/component-name-in-template-casing': ['error', 'kebab-case', {ignores: []}],
        'vue/html-indent': ['off', 4, {
            attribute: 1,
            baseIndent: 1,
            closeBracket: 0,
            alignAttributesVertically: true,
            ignores: []
        }],
        'vue/html-self-closing': ['error', {
            html: {
                void: 'never',
                normal: 'never',
                component: 'never'
            },
            svg: 'never',
            math: 'never'
        }],
        'vue/multiline-html-element-content-newline': ['off', {
            ignores: ['pre', 'textarea']
        }],
        'vue/mustache-interpolation-spacing': ['error', 'never'],
        'vue/order-in-components': ['error', {
            order: [
                'el',
                'name',
                'parent',
                'functional',
                ['delimiters', 'comments'],
                ['components', 'directives', 'filters'],
                'extends',
                'mixins',
                'inheritAttrs',
                'model',
                ['props', 'propsData'],
                'data',
                'computed',
                'watch',
                'LIFECYCLE_HOOKS',
                'methods',
                ['template', 'render'],
                'renderError'
            ]
        }],
        'vue/singleline-html-element-content-newline': ['off', {
            ignoreWhenNoAttributes: true,
            ignores: ['pre', 'textarea']
        }]
    },
    parserOptions: {
        parser: 'babel-eslint',
        ecmaVersion: 2018,
        sourceType: 'module'
    },
    plugins: [
        'babel'
    ],
    overrides: [{
        files: [
            '**/__tests__/*.{j,t}s?(x)',
            '**/tests/unit/**/*.spec.{j,t}s?(x)'
        ],
        env: {
            jest: true
        }
    }]
};