The original babel-plugin-transform-flow-strip-types hasn't been updated in 9 years and breaks silently in Babel 7 and 8 environments.
The fix
I published a maintained fork that works as a drop-in replacement:
npm install --save-dev babel-plugin-transform-flow-strip-types-maintained
Then update your .babelrc:
{
"plugins": ["transform-flow-strip-types-maintained"]
}
That's it. No other changes needed.
What's fixed
- Babel 7 and 8 peer dependency conflicts
- Missing syntax plugin declaration
- Deprecated visitor patterns
- allowDeclareFields support
Automated migration
If you want to update your entire project automatically:
npx flow-strip-migrate .
This updates your package.json and babel config in one command.
More info: https://flowstrip.netlify.app
npm: https://www.npmjs.com/package/babel-plugin-transform-flow-strip-types-maintained