.eslintrc.js

module.exports = {
    root: true,
    parserOptions: {
        parser: 'babel-eslint',
    },
    env: {
        browser: true,
        es6: true,
    },
    extends: [
        'airbnb-base',
        'plugin:prettier/recommended',
        'plugin:vue/recommended',
    ],
    plugins: ['vue'],
    settings: {
        'import/resolver': {
            node: {
                extensions: ['.js','.vue']
            }
        },
    },
    // add your custom rules here
    rules: {
        'import/extensions': [
            'error',
            'never',
            {
                js: 'never',
                vue: 'never',
            },
        ],
        'no-param-reassign': [
            'error',
            {
                props: true,
                ignorePropertyModificationsFor: [
                    'state', // for vuex state
                    'acc', // for reduce accumulators
                    'e', // for e.returnvalue
                ],
            },
        ],
        'vue/html-closing-bracket-newline': ['error', {
            'singleline': 'never',
            'multiline': 'always'
        }],
        // allow debugger during development
        'no-debugger': process.env.NODE_ENV === 'production' ? 2 : 0,
    },
};