Categorical Sort in JavaScript

logic1.js

let array = [
    {id: 0, type: "Office" },
    {id: 1, type: "Security" },
    {id: 2, type: "Office" },
    {id: 3, type: "Security" },
    {id: 4, type: "Security" },
    {id: 5, type: "Office" },
    {id: 6, type: "Agent" },
    {id: 7, type: "Security" },
    {id: 8, type: "Venkat" }
];
const order = ["Office", "Agent", "Security"];
for(let a of array){
  if(order.indexOf(a.type)==-1){
    order.push(a.type);
  }
}
array.sort((a,b)=>order.indexOf(a.type)-order.indexOf(b.type));
// console.log(array);

logic2.js

let initialArray =['A','D', 'Z','A','D', 'Z','G','C','G'];
let categoryOrder=['Z','A','D','C'];

function customSort(initialArray, categoryOrder){
  console.log(categoryOrder);
   for(let a of initialArray){
    if(categoryOrder.indexOf(a)==-1){
      console.log('true',a);
      categoryOrder.push(a);
    }else{
      console.log('false',a);
    }
  }
  console.log(categoryOrder);
  initialArray.sort((a,b)=>categoryOrder.indexOf(a)-categoryOrder.indexOf(b));
  return initialArray;
}

customSort(initialArray,categoryOrder);

initialArray.sort()