The package.json files for the react-dnd libraries contained a "module" field which was used to identify where the ES Module roots began. These fields were added with the intent of supporting CommonJS module loading (the de-facto NodeJS module system) simultaneously with the ES Module loading system (the emerging standard for JavaScript modules).
Unfortunately this change resulted in a lot of build headaches for users then their module bundlers started defaulting to using the ES Module roots.
This release reverts that change and leaves the v7 branch of React-Dnd as primarily using CommonJS. ES Module builds are still available under the esm/ folders, but it is up to users to use them at their own discretion.
In v8, ES Modules are used as the default module system. CommonJS-based packages are still available however in react-dnd-cjs, and react-dnd-html5-backend-cjs