getCircularKeys

index.js

function getCircularKeys(obj,opt={left:100}){
  if(!obj||typeof obj!=='object'){
    return ;
  }
  let keys=Object.keys(obj);
  function appendKeys(keys){
    opt.left-=keys.length;
    if(opt.left<=0){
       return true;
    }
  }
  if(appendKeys(keys)){
    return keys;
  }  
  for(const key in obj){
    const propertiesKeys=getCircularKeys(obj[key],opt);
    keys=[...keys,...propertiesKeys]
    if(appendKeys(propertiesKeys,opt)){
      return keys;
    }
  }
}