How does mongodb traverse the query?

  mongodb, question

The existing array is as follows.

const idArr = ['5950b7bfe78afb0868dc6599','5950b532b3c06f0838ed47e2','5950afcc85881f07bf454232'];
 //Each item in the array is used as the _id of the query. How to traverse the query?
 
 idArr.forEach((item,index)=>{
 db.details.find({_id:item});  //is that so?  Or?  .  .
 });

Mongodb found the answer in its official documents.

const idArr = ['5950b7bfe78afb0868dc6599','5950b532b3c06f0838ed47e2','5950afcc85881f07bf454232'];
 db.details.find({_id:{$in:idArr});  //This will do. Find out all at once.