$ npm install --save-dev flowtype-loader
OR, for lazy people like me:
$ npm i -D flowtype-loader
In your webpack configuration
var FlowtypePlugin = require('flowtype-loader/plugin');
module.exports = {
// ...
module: {
preLoaders: [
{test: /\.js$/, loader: "flowtype", exclude: /node_modules/}
]
},
plugins: [
new FlowtypePlugin()
// new FlowtypePlugin({cwd: '/path/'})
// new FlowtypePlugin({failOnError: true})
]
// ...
}