node.js - Use create-react-app behind corporate firewall

Question

there is any way for work with create-react-app behind corporate firewall by setting a proxy.

i have setted the proxy on npm and yarn, but this is what i see when try to create-react-app my-app:

Creating a new React app in F:
eactmy-app.

Installing packages. This might take a couple of minutes.
Installing react, react-dom, and react-scripts...

You appear to be offline.
Falling back to the local Yarn cache.

yarn add v0.23.4
info No lockfile found.
[1/4] Resolving packages...
error Couldn't find any versions for "react" that matches "latest" in our cache. Possible versions: ""
info Visit https://yarnpkg.com/en/docs/cli/add for documentation about this command.

Aborting installation.
  yarnpkg add --exact --offline react react-dom react-scripts has failed.

Deleting generated file... package.json
Deleting my-app / from F:
eact
Done.

Answer 1

I had been struggling with this for weeks. What worked for me was to include --use-npm at the end of the command and finally I got rid of the "no lockfile found" error. I sincerely hope this helps someone else struggling with the same issue.