.eslintrc.js

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

module.exports = {
    root: true,
    parser: 'babel-eslint',
    parserOptions: {
        sourceType: 'module',
    },
    env: {
        browser: true,
        mocha: true,
    },
    // https://github.com/feross/standard/blob/master/RULES.md#javascript-standard-style
    extends: [
        'eslint:recommended',
        'airbnb-base',
        'vue',
    ],
    // required to lint *.vue files
    plugins: [
        'html',
        'vue',
        'flowtype-errors',
    ],
    // check if imports actually resolve
    settings: {
        'import/resolver': {
            'webpack': {
                'config': './node_modules/laravel-mix/setup/webpack.config.js',
            },
        },
    },
    globals: {
        expect: true,
        sinon: true,
    },
    // add your custom rules here
    rules: {
        // don't require .vue extension when importing
        // 'import/extensions': ['off', 'never', {
        //     'js': 'never',
        //     'vue': 'never'
        // }],
        // allow optionalDependencies
        'import/no-extraneous-dependencies': ['error', {
            'optionalDependencies': ['test/unit/index.js']
        }],
        'semi': ['error', 'always'],
        'comma-dangle': ['error', 'only-multiline'],
        'space-before-function-paren': ['error', 'never'],
        'object-curly-spacing': ['error', 'always'],
        // 'import/no-unresolved': [0, { commonjs: true, amd: true }],
        'flowtype-errors/show-errors': 2,
        // allow debugger during development
        'no-debugger': process.env.NODE_ENV === 'production' ? 2 : 0,
        'indent': ['error', 4],
    },
};