.eslintrc.js

module.exports = {
    "env": {
        "browser": true,
        "node" : true,
		"mocha" : true,
        "es6": true,
		"amd" : false,
    },
    "globals": {
        "Piano": true,
        "Tone": true,
	},
	parser: '@typescript-eslint/parser',
	plugins: ['@typescript-eslint'],
	"parserOptions": {
         "ecmaVersion": 2017,
         "ecmaFeatures": {
             "jsx": true
         },
         "sourceType": "module"
     },
	// extends: ['plugin:@typescript-eslint/recommended'],
	extends: ['eslint:recommended'],
    "rules": {
		"dot-location" : [ "error", "property" ],
		"linebreak-style": [ "error", "unix" ],
		"eqeqeq" : [ "error" ],
		"curly" : [ "error", "all" ],
		"dot-notation" : [ "error" ],
		"no-throw-literal" : [ "error" ],
		"no-useless-call" : [ "error" ],
		"no-unmodified-loop-condition": [ "error" ],
		"quote-props" : [ "error", "as-needed" /*"as-needed"*/ ],
		"quotes": [ "error","single" ],
		"no-lonely-if" : [ "error" ],
		"semi": [ "error", "never" ],
		//STYLE
		"indent": [ "error", "tab", { "SwitchCase": 1 } ],
		"no-multi-spaces" : [ "error" ],
		"array-bracket-spacing" : [ "error" , "never" ],
		"block-spacing": [ "error", "always" ],
		"func-call-spacing" : [ "error", "never" ],
		"key-spacing" : [ "error", {"beforeColon" : true, "afterColon" : true} ],
		"brace-style": [ "error", "1tbs" ],
		"space-in-parens": [ "error", "never" ],
		"eol-last": [ "error", "always" ],
		"lines-between-class-members": [ "error", "always" ],
		"no-multiple-empty-lines": [ "error", { "max": 1, "maxEOF": 1, "maxBOF": 0} ],
		"no-unneeded-ternary": [ "error" ],
		"object-curly-spacing": [ "error" , "always" ],
		"space-unary-ops": [ "error" , { "words" : true, "nonwords" : false } ],
		"block-spacing" : ["error", "always"],
		"keyword-spacing" : ["error", { "before": true }],
		"space-before-function-paren": ["error", {"anonymous": "never", "named": "never", "asyncArrow": "always"}],
		"comma-spacing": ["error", { "before": false, "after": true }],
        "space-before-blocks": ["error", { "functions": "never", "keywords": "never", "classes": "always" }]
    }
};