addbank.js.erb

window.location.href = <%= root_url %>

balanced.js

$.ajax({ url: '#{addbank_bankaccts_path}',
  type: 'POST',
  beforeSend: function(xhr) {xhr.setRequestHeader('X-CSRF-Token', '#{form_authenticity_token}')},
  dataType: "json",
  data: 'account_uri=' + response.data.uri ,
  success: function(response) {
    
  }
});

bankaccts_controller.rb

class BankacctsController < ApplicationController

  def new
  end
  
  def addbank
      # add bank account logic here
      # redirect_to root_url
      # ^ that doesn't work

      # respond_to do |format|
      #   format.js
      # end
      # ^ couldn't get that to work either
  end
end