How to make rollup expand `require` statements? - babeljs

Question

I'm trying to wrap my head around rollup.
I'm using a library that generates a file with this format: IIFE with a require statement. For example
// index.js
(function() {
const myThing = require('./thing');
})()
//thing.js
module.exports = { a: 3 };
I'm trying to use rollup with a bunch of other things, but my bundle.js ends up looking like this:
(function () {
var myThing = require('./thing');
})();
What do I need to do so that my bundle.js ends up looking like this?:
(function () {
var myThing = { a: 3 };
})();
In case there is a problem with my setup, here is the rollup.config.js that I'm using:
var babel = require('rollup-plugin-babel');
export default {
input: 'index.js',
output: {
file: 'dist/bundle.js',
format: 'es'
},
plugins: [
babel({
exclude: 'node_modules/**'
})
]
};
These are the packages I have installed:
"babel-core": "^6.26.3",
"babel-plugin-external-helpers": "^6.22.0",
"babel-preset-env": "^1.6.1",
"rollup": "^0.58.2",
"rollup-plugin-babel": "^3.0.4"
And my babel config:
{
"presets": [
[
"env",
{
"modules": false
}
]
],
"plugins": [
"external-helpers"
]
}
To build, I'm just calling rollup -c.

Answer 1

Okay, I figured it out. All I had to use was use the CommonJS plugin:
import babel from 'rollup-plugin-babel';
import resolve from 'rollup-plugin-node-resolve';
import commonjs from 'rollup-plugin-commonjs';
export default {
input: 'index.js',
output: {
file: 'dist/bundle.js',
format: 'cjs'
},
plugins: [
resolve(),
commonjs(),
babel({
exclude: 'node_modules/**'
})
]
};