node-with-cluster-time.js

async function main() {
  await client.connect();

  const db = client.db(dbName);

  const collection = db.collection('testCollection');
  const session = client.startSession({ causalConsistency: true });

  const newDocument = await collection.insertOne({}, { session, writeConcern: { w: "majority" } }); 
  const foundDocument = await collection.findOne(
    {_id: newDocument.insertedId},
    { session, readConcern: "majority" }
  );

  console.log(foundDocument);
}