.eslintrc.js

// adapted from: https://github.com/Khan/style-guides/pull/25
module.exports = {
  extends: 'eslint:recommended',
  env: {
    browser: true,
    node: true,
    jest: true
  },
  rules: {
    'arrow-parens': [2, 'always'],
    'arrow-spacing': 2,
    'brace-style': 2,
    camelcase: [
      2,
      {
        properties: 'always'
      }
    ],
    'comma-dangle': [2, 'never'],
    'comma-spacing': [
      2,
      {
        before: false,
        after: true
      }
    ],
    'eol-last': [0],
    'guard-for-in': 2,
    //"indent": [2, 4],
    'keyword-spacing': 2,
    'linebreak-style': [2, 'unix'],
    /*
		"max-len": [2, 80, 4, {
			"ignoreUrls": true,
			"ignorePattern": "^\\s*const\\s.+=\\s*require\\s*\\("
		}],
		*/
    'no-alert': 2,
    'no-array-constructor': 2,
    'no-const-assign': 2,
    'no-debugger': 2,
    'no-dupe-keys': 2,
    'no-new-object': 2,
    'no-spaced-func': 2,
    'no-this-before-super': 2,
    'no-throw-literal': 2,
    'no-trailing-spaces': 2,
    'no-unreachable': 2,
    'no-unused-vars': 1,
    'no-var': 0,
    //"object-curly-spacing": [2, "always"],
    'one-var': [2, 'never'],
    'prefer-const': 1,
    'prefer-template': 2,
    quotes: [2, 'single'],
    semi: [2, 'always'],
    'space-before-blocks': 2,
    // "space-before-function-paren": 2,
    'space-infix-ops': 2,
    strict: [0, 'never'],
    'valid-jsdoc': 2
  }
};