.eslintrc.js

module.exports = {
  env: {
    node: true,
  },
  rules: {
    /**
     * JS
     */
    // When single export, prefer using default over named export
    'import/prefer-default-export': 0,
    // If one param in arrow func, remove parentheses
    'arrow-parens': ['error', 'as-needed'],
    // x++ is allowed, but should be careful with whitespace
    'no-plusplus': 0,
    // Function input params can be reassigned
    'no-param-reassign': 0,
    // Allow continue in loops
    'no-continue': 0,
    // Allow console.logs
    'no-console': 0,
    // Allow calling prototype methods directly on instances
    'no-prototype-builtins': 0,
    // Allow complex ternaries
    'no-nested-ternary': 0,
    // Switch statement doesn't have to define default case
    'default-case': 0,
    // No space between function name and parens - function withoutSpace(x) {
    'space-before-function-paren': 0,
    // Guard hasOwnProperty in for-in should be there, but we prefer return:
    // if (!x.hasOwnProperty(key)) return;
    'guard-for-in': 0,
    // Allow lexical declarations in case statement
    'no-case-declarations': 0,
  },
};