embark/dapps/templates/boilerplate/app/js/index.js

import EmbarkJS from 'Embark/EmbarkJS';

// import your contracts
// e.g if you have a contract named SimpleStorage:
//import SimpleStorage from 'Embark/contracts/SimpleStorage';


EmbarkJS.onReady((err) => {
  // You can execute contract calls after the connection
});