The feature of using NPM modules
is a really important one for us and we are doing our best to having it as soon as possible, but it still not here.
I am not sure if bcrypt.js has native bindings for iOS or Android though. If these exist, however, you can use the workaround of copying the bcrypt.js file from the node_modules/bcrypt folder under a lib folder of your application and "require"-int it in your code. Please note, that you will need to copy the dependencies as well (bindings.js).