also ts+react webpack is configured with HotModuleReplacementPlugin ()\,
Why do I module.hot error: TS2339: Property "hot" does not exist on type" NodeModule".

webpack.config.js

    new webpack.HotModuleReplacementPlugin(),

demo.ts

    if(module.hot) {
    {
        // ...
    }

TS2339: Property "hot" does not exist on type" NodeModule".

resolved

solution:

1. if (module as any).hot {}

2. yarn add @types/webpack.env -D