.eslintrc.js

module.exports = {
	root: true,

	parserOptions: {
		parser    : 'babel-eslint',
		sourceType: 'module'
	},

	env: {
		browser: true,
		node   : true
	},

	extends: [
		'plugin:vue/essential',
		'@vue/standard'
	],

	// required to lint *.vue files
	plugins: [
		'vue'
	],

	globals: {
		'__static'         : true,
		'WorkerGlobalScope': true,
		'FileReaderSync'   : true,
		'appVue'           : true
	},

	// add your custom rules here
	rules: {
		// allow async-await
		'generator-star-spacing': 'off',

		// allow paren-less arrow functions
		'arrow-parens'                : 0,
		'one-var'                     : 0,
		'no-tabs'                     : 0,
		'spaced-comment'              : 0,
		'no-extra-boolean-cast'       : 0,
		'space-before-function-paren' : 0,
		'space-infix-ops'             : 0,
		'padded-blocks'               : 0,
		'no-useless-call'             : 0,
		'standard/no-callback-literal': 0,
		'no-multiple-empty-lines'     : 0,
		'indent'                      : ['error', 'tab', { 'SwitchCase': 1 }],
		'key-spacing'                 : ['error', { 'align': 'colon' }],
		'quote-props'                 : ['error', 'consistent'],

		'import/first'                     : 0,
		'import/named'                     : 2,
		'import/namespace'                 : 2,
		'import/default'                   : 2,
		'import/export'                    : 2,
		'import/extensions'                : 0,
		'import/no-unresolved'             : 0,
		'import/no-extraneous-dependencies': 0,

		// allow console.log during development only
		'no-console' : process.env.NODE_ENV === 'production' ? 'error' : 'off',
		// allow debugger during development only
		'no-debugger': process.env.NODE_ENV === 'production' ? 'error' : 'off'
	}
}