Make some of your npm dependencies singletons
When doing npm install, packages can get installed multiple times depending on the dependencies of your dependencies. For packages such as react or graphql this causes problems and since npm doesn't provide a way to force a package to be a singleton, we've written this tool to removes all the extra versions of the package.
Just make sure to add the version you actually want to keep in dependencies part of the package.json.
npm install flatten-dependencies --save-dev
npx flatten-dependencies graphql
... or to turn multiple packages into singletons ...
npx flatten-dependencies graphql react @types/react
Just add the a call to this script into the postinstall part of the package.json:
....
"scripts": {
...
"postinstall: "flatten-dependencies graphql react @types/react"
...
}
...