Babel Plugin Transform ES2017 Object Entries

0.0.5 verified Sat Apr 25 auth: no javascript deprecated

Babel plugin (v0.0.5, last updated 2017) that replaces `Object.entries()` and `Object.values()` calls with ES5-compatible generated functions. Unlike alternatives that import core-js polyfills, this plugin inlines inline implementations. It only handles these two methods, not the full object spread or other ES2017 features. Use is discouraged in favor of modern @babel/preset-env with core-js or direct polyfill imports.

Common errors

error Module build failed: Error: Plugin 0 specified in "../.babelrc" provided an invalid property of type "function". ↓

cause Using the plugin name as default import in babel.config.js instead of string reference.

fix

Use string plugin name in plugins array, e.g., plugins: ['transform-es2017-object-entries']

error ReferenceError: Object.entries is not defined ↓

cause Plugin did not transform the call because it wasn't a direct call to Object.entries.

fix

Rewrite as direct call: Object.entries(obj) or use a different polyfill strategy.

Warnings

deprecated Package is deprecated; last release over 7 years ago, no updates for modern Babel 7+. ↓

fix Use @babel/preset-env with core-js or @babel/plugin-proposal-object-entries (via preset-env).

gotcha Only transforms call expressions directly on Object.entries/Object.values; not polyfilled if accessed via variable or prototype. ↓

fix Ensure calls are written as `Object.entries(obj)` not `const {entries} = Object; entries(obj)`.

gotcha Does not handle Symbol properties or non-enumerable properties; matches native Object.entries behavior. ↓

fix Accept limitation; use a more complete polyfill if needed.

Install

npm install babel-plugin-transform-es2017-object-entries

yarn add babel-plugin-transform-es2017-object-entries

pnpm add babel-plugin-transform-es2017-object-entries

Imports

plugin

wrong

import plugin from 'babel-plugin-transform-es2017-object-entries'

correct

// In .babelrc: { "plugins": ["transform-es2017-object-entries"] }

This is a Babel plugin, not a runtime import. Configure via .babelrc or babel.config.js.

Quickstart

Shows Babel configuration and transformation of Object.entries and Object.values to ES5 inline functions.

// .babelrc
{
  "plugins": ["transform-es2017-object-entries"]
}

// input.js
const obj = { a: 1, b: 2 };
const entries = Object.entries(obj);
const values = Object.values(obj);

// output (transpiled)
var _entries = function (obj) {
  var ownProps = Object.keys(obj);
  var i = ownProps.length;
  var resArray = new Array(i);
  while (i--) resArray[i] = [ownProps[i], obj[ownProps[i]]];
  return resArray;
};
var _values = function (obj) {
  var ownProps = Object.keys(obj);
  var i = ownProps.length;
  var resArray = new Array(i);
  while (i--) resArray[i] = obj[ownProps[i]];
  return resArray;
};

var entries = _entries(obj);
var values = _values(obj);