add-esmodule

Add __esModule property to native ES module objects

Motivation

Much of the javascript ecosystem relies of ES modules having an __esModule property. However, native ES modules do not have that property. This project is a workaround for that problem.

Installation

npm install --save add-esmodule

# alternative
yarn add add-esmodule

Usage

import foo from "foo";
import { cloneWithEsModuleProperty } from "add-esmodule";

const fooCompat = cloneWithEsModuleProperty(foo);

foo.__esModule; // undefined
fooCompat.__esModule; // true

Browser compatibility

add-esmodule works in IE 11+

Implementation notes

• Live Bindings for modules are supported (via object getters on the cloned object)
• The cloned module object is frozen
• Symbols, including toString, are properly cloned