gistfile1.txt

// Doing this:

const amountStyles = {
  paddingTop: 50
}

const expenseOptions = {
  fields: {
    amount: {
      stylesheet: amountStyles,
      placeholder: '$ 0.00'
    }
  }
}

// Triggers this error:
Cannot read property 'normal' of undefined
textbox.js

// What is the correct structure?

You can see the structure here https://github.com/gcanti/tcomb-form-native/blob/master/lib/stylesheets/bootstrap.js#L62

basically an object with 3 keys corresponding to 3 possible textbox states

p.s. open an issue if something is not clear in the documentation (or you have suggestions to improve it). Also PRs are very appreciated