.eslintrc

/*******************************************************************************
 * A Meteor Developer's ECMA 6th Edition ESLint Configuration
 * by @iDoMeteor
 *
 * http://github.com/idometeor/meteor-style-skeleton/.eslint
 *
 * TL;DR
 *
 * This is more friendly than Meteor's config.. mostly.  Not always though. :)
 * Check Github/README.md for quick usage instructions.
 *
 * Description
 *
 * Meteor upholds a high standard for coding, so do I, and so should you.
 * With that goal in mind, I set every option in this file with intent.  It
 * may provide you with a fair amount of frustration if you are new to linting
 * tools.
 *
 * This is intended to be integrated into your editor (along with .editorconfig)
 * in such a way as to allow you to use it continually.  If you drop it on a
 * large, existing code base that may be... lax in coding standards, expect to
 * get an enormous amount of reports.
 *
 * However, if you already have smart ECMA coding style, then you will most
 * likely appreciate the learning experience / tightening up of your style.
 *
 * Meter and ECMA are both intended to be flexible.  This file allows for that
 * flexibility where appropriate, but also has sane protections for actual
 * poor programming methodology.  Hopefully it will allow enough flexibility
 * to still take advantage of the fun parts of the language.
 *
 * In general, this configuration in tandem with my .jscsrc should provide
 * one of the best programmatic ways to ensure that your Meteor code is as
 * near to being inline with the MDG Style Guide as is practical from an
 * automated tool.
 *
 * Caveats:
 *
 * I allow (and prefer, unless Sciencing) ==.  The Abstract Equality
 * Comparison Algorithm is no more "obscure (src: ESLint)" than is the
 * Strict Equality Comparison Algorithm.  Actually, it comes first not only
 * in this paragraph, but also in the ECMA specification (11.9.3 vs 11.9.6).
 *
 * The standard convention comes from the same old-school origin as using !!.
 * Namely, poor programming practices and ECMA implementations from the past.
 * There are distinct advantages to using == in non-precision (read
 * non-mission-critical) contexts.  I'll leave that dark magic up to you to
 * discover.
 *
 * Point is, you should probably be statically typing if you are that are that
 * concerned about precision, or not concerned about this level of semantics if
 * your ability to keep your types straight is ... still developing.
 *
 * That being said, I throw warnings on (x == null) || (x != null). :p
 *
 * This is not for niave Javascripters, you should be able to
 * grok what this is going to do for you or use eslint --init at the command
 * line and go from there.
 *
 * I use object literals instead of switch, as one should.  However, once in
 * a while, a switch w/fallthrough and/or no default is actually highly useful.
 * For instance, Twiefbot uses micro-switches in the natural language
 * processing.  Therefore, they are allowed, but will throw warnings.  That
 * means that, while you should not do it, if you really know what you're doing
 * then go for it.
 *
 * Contributing:
 *    I welcome pull requests!
 *
 * ****************************************************************************/

{
  "parser": "@babel/eslint-parser",
  "env": {
    "browser": true,
    "es6": true,
    "jasmine": true,
    "jquery": true,
    "meteor": true,
    "mocha": true,
    "mongo": true,
    "node": true,
    "phantomjs": true,
    "shared-node-browser": true,
    "worker": true
  },

  "rules": {

    /**
     * General
     */

    // This will throw warnings anywhere 'use strict' occurs, which is good.
    "strict": 0,
    "object-curly-spacing": ["error", "always"],
    "indent": ["error", 2],
    "block-scoped-var": 2,
    "dot-notation": [1, {"allowKeywords": true}],
    "no-param-reassign": 0,
    "radix": 2,
    "yoda": 2,
    "vars-on-top": 2,
    "curly": 0,
    "no-cond-assign": [2, "always"],
    "no-constant-condition": 2,
    "no-dupe-keys": 2,
    "no-duplicate-case": 2,
    "no-else-return": 2,
    "no-empty": 2,
    "no-eq-null": 2,
    "no-eval": 0,
    "no-ex-assign": 2,
    "no-extend-native": 2,
    "no-extra-bind": 2,
    "no-extra-semi": 2,
    "no-func-assign": 2,
    "no-implied-eval": 1,
    "no-inner-declarations": 2,
    "no-invalid-regexp": 2,
    "no-irregular-whitespace": 2,
    "no-lone-blocks": 2,
    "no-loop-func": 2,
    "no-native-reassign": 2,
    "no-new": 1,
    "no-new-func": 2,
    "no-new-wrappers": 2,
    "no-obj-calls": 2,
    "no-octal": 1,
    "no-octal-escape": 2,
    "no-proto": 2,
    "no-redeclare": 2,
    "no-return-assign": 0,
    "no-script-url": 2,
    "no-self-compare": 2,
    "no-sequences": 2,
    "no-shadow": [1, {"hoist": "functions"}],
    "no-sparse-arrays": 2,
    "no-throw-literal": 2,
    "no-unreachable": 2,
    "no-with": 2,
    "use-isnan": 2,
    "wrap-iife": [2, "any"],
    "comma-dangle": [1, "always-multiline"],
    "consistent-return": 1,
    "default-case": 1,
    "guard-for-in": 1,
    "max-len": [1, 80, 2],
    "no-caller": 2,
    "no-extra-boolean-cast": 1,
    "no-fallthrough": 2,
    "no-floating-decimal": 2,
    "no-multi-spaces": 2,
    "no-multi-str": 2,
    "no-shadow-restricted-names": 2,
    "no-unused-vars": [1, {
      "vars": "local",
      "args": "after-used"
    }],
    "no-use-before-define": 0,

    /**
     * Style
     */
    "brace-style": [2,
      "stroustrup", {
      "allowSingleLine": true
    }],
    "comma-spacing": [2, {
      "before": false,
      "after": true
    }],
    "comma-style": [2, "last"],
    "eol-last": 1,
    "func-names": 0,
    "func-style": 1,
    "key-spacing": [2, {
        "afterColon": true,
        "beforeColon": false
    }],
    "linebreak-style": [
      2,
      "unix"
    ],
    "new-cap": 2,
    "no-multiple-empty-lines": 2,
    "no-nested-ternary": 2,
    "no-new-object": 2,
    "no-array-constructor": 2,
    "no-spaced-func": 2,
    "no-trailing-spaces": 2,
    "no-underscore-dangle": 0,
    "one-var": [2, "never"],
    "quotes": [
      0, "single", "avoid-escape"
    ],
    "semi": [2, "always"],
    "semi-spacing": [2, {
      "before": false,
      "after": true
    }],
    "space-before-blocks": 2,
    "space-before-function-paren": [2, "always"],
    "space-infix-ops": 2,
    "keyword-spacing": 2
  }
}