eslint-config/index.js

export default [{
  languageOptions: {
      ecmaVersion: 2018,
      sourceType: "module",
  },

  rules: {
      "brace-style": "error",

      camelcase: ["error", {
          properties: "never",
          ignoreDestructuring: true,
      }],

      "comma-dangle": ["error", "always-multiline"],
      "comma-spacing": "error",
      "comma-style": "error",
      curly: ["error", "all"],
      "func-call-spacing": "error",

      "max-len": ["warn", {
          code: 120,
          tabWidth: 2,
          ignoreComments: false,
          ignoreUrls: true,
          ignoreStrings: true,
          ignoreTemplateLiterals: true,
          ignoreRegExpLiterals: true,
      }],

      "no-multiple-empty-lines": ["error", {
          max: 1,
      }],

      "no-tabs": "error",
      "no-trailing-spaces": "error",
      "object-curly-spacing": ["error", "always"],

      "one-var": ["error", {
          var: "never",
          let: "never",
          const: "never",
      }],

      "operator-linebreak": ["error", "after"],
      "padded-blocks": ["error", "never"],
      "quote-props": ["error", "consistent-as-needed"],

      quotes: ["error", "double", {
          avoidEscape: true,
          allowTemplateLiterals: true,
      }],

      semi: "error",
      "semi-spacing": "error",
      "space-before-blocks": "error",

      "space-before-function-paren": ["error", {
          named: "never",
          anonymous: "always",
          asyncArrow: "always",
      }],

      "spaced-comment": ["error", "always", {
          line: {
              markers: ["/"],
              exceptions: ["-", "+"],
          },

          block: {
              markers: ["!"],
              exceptions: ["*"],
              balanced: true,
          },
      }],

      "template-tag-spacing": ["error", "never"],

      "arrow-body-style": ["error", "as-needed", {
          requireReturnForObjectLiteral: false,
      }],

      "arrow-parens": ["error", "always"],

      "arrow-spacing": ["error", {
          before: true,
          after: true,
      }],

      "no-confusing-arrow": ["error", {
          allowParens: true,
      }],

      "no-var": "error",

      "prefer-const": ["error", {
          destructuring: "any",
          ignoreReadBeforeAssign: true,
      }],

      "prefer-destructuring": ["error", {
          VariableDeclarator: {
              array: false,
              object: true,
          },

          AssignmentExpression: {
              array: true,
              object: false,
          },
      }],

      "prefer-rest-params": "error",
      "prefer-spread": "error",
      "template-curly-spacing": "error",
  },
}];