text field input's autoFocus causes error

[moog16]

steps to reproduce:

1. create
2. add autoFocus prop to <Input autoFocus ... />

result: error shown in above screenshot

[kw-at-oocl]

Also what is the proper API to programmatically focus the text field in my componentDidMount? I'm getting it to work with below, but it is really ugly! There has got to be a better way....

this.refs.pickupQtyTextField.foundation_.activateFocus()
const input = document.getElementsByClassName('mdc-text-field__input pickup-qty')[0]
if (input) {
      input.focus();
}

[moog16]

Issue #310 will be fixing that. There is currently no clean way to focus.