.eslintrc.js

module.exports = {
    parserOptions: {
        ecmaVersion: '2019',
    },
    env: {
        browser: true,
        node: true,
        commonjs: true,
        es6: true
    },
    extends: 'eslint:recommended',
    rules: {
        'array-bracket-spacing': [2, 'never'],
        'brace-style': [2, 'stroustrup', {allowSingleLine:true}],
        camelcase: 0,
        'comma-spacing': 2,
        'comma-dangle': [1, 'always-multiline'],
        // 'consistent-return': 0,
        'constructor-super': 0,
        curly: [2, 'multi-line'],
        'dot-notation': 2,
        'eol-last': 2,
        eqeqeq: 2,
        indent: [2, 'tab', {
            SwitchCase: 1,
            VariableDeclarator: 0,
            MemberExpression: 1,
            CallExpression: {
                arguments: 1,
            },
            ArrayExpression: 1,
            ObjectExpression: 1,
        }],
        'key-spacing': [1, {
            singleLine: {
                beforeColon: false,
                afterColon: false,
            },
            multiLine: {
                beforeColon: false,
                afterColon: true,
            },
        }],
        'linebreak-style': [2, 'unix'],
        // 'new-cap': 0,
        'new-parens': 2,
        'no-alert': 2,
        'no-array-constructor': 2,
        'no-caller': 2,
        'no-console': 1,
        'no-constant-condition': 1,
        'no-debugger': 1,
        'no-empty': [2, {allowEmptyCatch:true}],
        'no-extend-native': 2,
        'no-extra-bind': 2,
        // 'no-extra-parens': 0,
        'no-implied-eval': 2,
        'no-iterator': 2,
        'no-label-var': 2,
        // 'no-lone-blocks': 0,
        // 'no-loop-func': 0,
        'no-multi-spaces': [2, {ignoreEOLComments:true}],
        'no-multi-str': 2,
        'no-multiple-empty-lines': [2, {max:3}],
        'no-native-reassign': 2,
        // 'no-new': 0,
        'no-new-func': 2,
        'no-new-object': 2,
        'no-new-wrappers': 2,
        'no-octal-escape': 2,
        'no-proto': 2,
        // 'no-return-assign': 0,
        'no-script-url': 2,
        // 'no-sequences': 0,
        'no-spaced-func': 2,
        'no-trailing-spaces': 1,
        'no-this-before-super': 2,
        // 'no-underscore-dangle': 0,
        'no-unused-vars': 1,
        'no-unused-expressions': 2,
        'no-shadow': 2,
        'no-shadow-restricted-names': 2,
        'no-undef-init': 2,
        'no-use-before-define': 0, //[2, {classes:false, variables:false,}],
        'no-with': 2,
        // 'one-var': 0,
        'quote-props': [1, 'as-needed'],
        quotes: [1, 'single'],
        semi: [2, 'always'],
        'semi-spacing': [1, {before:false, after:true}],
        // 'space-after-keywords': 0,
        'space-before-function-paren': [1, 'never'],
        'space-in-parens': [1, 'never'],
        // 'space-infix-ops': 0,
        'strict': [2, 'never'],
        yoda: [1, 'always', {onlyEquality: true}],
    },
};