Destructuring assignment

const name = 'cute';
const surname = 'luna';

var sayHello = function({ name, surname }) {
  var cute = 'fuck you'; 
  var fuck = 'fuck your dick';
  console.log(`Hello ${name} ${surname}! How are you?`);
  console.log({cute});
  console.log({cute:fuck});
};

sayHello({ name: 'John', surname: 'Smith' });
sayHello({ name, surname });

可以把上面直接貼在console，或是貼到babel玩玩