recursive depth-first object traversal for lottie json

traverse.js

// modified from derick bailey https://derickbailey.com/2015/07/19/using-es6-generators-to-recursively-traverse-a-nested-data-structure/

function getType(object) {
  return Object.prototype.toString.call(object)
    .match(/^\[object\s(.*)\]$/)[1].toLowerCase()
}

function isArray(o) {
  return getType(o) === 'array';
}

function isObject(o) {
  return getType(o) === 'object';
}

let testData = {
  a: 1,
  b: 2,
  c: [1,2,3],
  d: {
    x:1,
    y:{
      u:[1,2,3],
      v:5
    }
  },
  g: [1,2,[1,2,3]]
}

function *processData(data, depth, dataIsObject){
	data = dataIsObject ? Object.entries(data) : data
	for (let i = 0; i < data.length; i++){
		let key = dataIsObject ? data[i][0] : i;
		let val = dataIsObject ? data[i][1] : data[i];
		if (isArray(val) || isObject(val)) {
			yield *processData(val, ++depth, isObject(val));
		}
		else {
			yield {val, depth}
		}
	}		
}

let it = processData(testData, 0, true);
let res = it.next();
while(!res.done){
	console.log(res.value)
  res = it.next();
}