"npm start" error if there is a .babelrc file in parent folder

[forclan]

if I have a folder named "React" or some other name.
run create-react-app test-react in folder React
cd ./test-react
run npm start it works fine;

but if I put a .babelrc file in folder "React"
echo "{presets: ['es2015']}" > ../.babelrc
and run npm start
if will cause a error:
Failed to compile. Error in ./src/index.js Module build failed: Error: Couldn't find preset "es2015" relative to directory "/Users/forclan/Documents/Javascript/React" at Array.map (native) @ multi main

It seems that react-scripts will find a .babelrc file the way up to "~"(if i put the .babelrc file in my home folder,it will generate the same error);

[mxstbr]

This is a babel-specific feature, see here: https://babeljs.io/docs/usage/babelrc#lookup-behavior

We could add a babel key to the package.json, but I don't think that's worth it. It'll just confuse beginners, and only people who know what they're doing will add a .babelrc to their folder anyway.

Thanks for kicking off this discussion!

[insin]

Would adding babelrc: false to the query config for babel-loader prevent this?

Babel itself has a babelrc option which you can set to false to disable config lookup.

[gaearon]

Would adding babelrc: false to the query config for babel-loader prevent this?

I think it should.

[alexzherdev]

Sounds straightforward, is this up for grabs? This needs to happen in both dev and prod, right?

[mxstbr]

Would adding babelrc: false to the query config for babel-loader prevent this?

Ohh, nice one @insin!

Feel free to submit a PR @alexzherdev!

[mxstbr]

Done by the amazing @alexzherdev in #236! 👍

[hzoo]

Anyone want to add a note about using babelrc: false in the docs https://github.com/babel/babel.github.io/blob/master/docs/usage/babelrc.md? Otherwise I'l do it

[loganfsmyth]

babelrc: false should do the trick for webpack. An alternative would be to add a no-op {} .babelrc file, or put "babel": {} in the package.json so it'll find the local config and stop searching in parents.

[gaearon]

Can you verify 0.2.0 alpha fixes this? #190