A webpack loader built around flow-bin to enforce type checking with Flow.
$ npm install --save-dev flow-bin flow-bin-loader
Add the plugin to your webpack config as follows:
module: {
rules: [
{
test: /\.jsx?$/,
loader: 'flow-bin-loader',
exclude: /node_modules/,
enforce: 'pre',
}
]
},
Don't forget to add // @flow
to the top of the files you want to be checked.
By default, modules are resolved with respect to the directory where
.flowconfig
lives, so you might need to tell Flow how to map paths to the
correct directory.
In order to do that, create a file named .flowconfig
in the root directory
of your project and add a module mapper rule such as the one below.
[options]
module.name_mapper='^\(.*\)$' -> '<PROJECT_ROOT>/src/\1'
For the complete list of options, visit https://flowtype.org/docs/advanced-configuration.html