[HMR] Edit files will cause full page reload.

[SidKwok]

Is this a bug report?

Yes

Can you also reproduce the problem with npm 4.x?

yes

Which terms did you search for in User Guide?

(Write your answer here if relevant.)
not relevant

Environment

1. node -v: 7.6
2. npm -v: 4.3
3. yarn --version (if you use Yarn): 0.27.5
4. npm ls react-scripts (if you haven’t ejected): 1.0.11

Then, specify:

1. Operating system: macOS 10.12.6
2. Browser and version (if relevant): chrome 60.0.3112.90

Steps to Reproduce

(Write your steps here:)

1. edit src/App.js
2. save

Expected Behavior

Only specific area will change.

Actual Behavior

Full page reload

Reproducible Demo

(Paste the link to an example project and exact instructions to reproduce the issue.)

Thoughts

webpack2 doesn't seem to have such issue.

[gaearon]

This is not a bug but expected.
#93

We may implement hot reloading of React components in the future (there is a pending PR) but we haven't had time to finish it yet.

You can use module.accept calls as explained in the linked issue to implement something manual yourself, although this won't preserve the state of components.

[AzrizHaziq]

For those who are using with Typescript and has error Property 'hot' does not exist on type 'NodeModules'

add this line in react-app-env.d.ts

/// <reference types="react-scripts" />

declare var module: NodeModule;
interface NodeModule {
    hot: any     // this is only a temporary answer  😄
}