Core-js: What are the differences between core-js and core-js-bundle?

[rzschoch]

I’ve no idea when to use the default core-js or the core-js-bundled installation. Are there any helpful examples you could think of?

[nicolo-ribaudo]

core-js are a lot of commonjs modules: use it if you are using webpack of node.
core-js-bundle is a single big polyfill file: use it in browsers when you want to avoid using a bundler.