How to reduce the size of reactdom?

Question

React

When "import ReactDOM from "react-dom";" the size of the final js file increases by ~ 400kb+.
In some github repositories I saw final js files ~ 200kb in size. Is it possible somehow to squeeze this whole thing still? (I already get a minified file at the output, but nevertheless its weight is noticeable)
// Apart from one small component, there is no more js code.

Answer 1

Apparently, you are not building in production mode.
react-dom minified - 100kb
react minified - 6kb
But storing bundles in a repository is wrong.