.eslintrc.js

module.exports = {
    'extends': 'airbnb',
    'env': {
        'mocha': true
    },
    'globals': {
        'define': true,
        'document': true,
        'Event': true,
        'Image': true,
        'localStorage': true,
        'requestAnimationFrame': true,
        'Audio': true,
        'Element': true,
        'window': true

    },
    'rules': {
        // Override any settings from the 'parent' configuration
        'import/no-unresolved': 0,
        'indent': [ 2, 4, { 'SwitchCase': 1, 'VariableDeclarator': 1 } ],
        'max-len': [ 2, 130, 2, {
            'ignoreUrls': true,
            'ignoreComments': false
        } ],
        'no-console': 0,
        'no-restricted-syntax': 1,
        'no-underscore-dangle': 0,
        'spaced-comment': [ 2, 'always', { 'exceptions': [ '*' ] } ],
        'strict': 0,
        'no-plusplus': [
            'error', { 'allowForLoopAfterthoughts': true }
        ],
        'prefer-destructuring': [
            'error', { 'array': false }
        ],
        'import/extensions': [
            '.js'
        ]
    }
};