MongoDB节点驱动程序:如何从节点运行load命令?

我正在运行MongoDB 4.0: 我正试图在Mongo中加载一个脚本:

var MongoClient = require("mongodb").MongoClient;
var database = 'mongodb://localhost:27017,localhost:27018,localhost:27019/myDb?replicaSet=rs'

MongoClient.connect(database)
.then( db => {
  return db.command("load('myScript.js')");
})
.catch( err => {
  console.log(err);
});

我收到一条错误消息说:

MongoError: no such command: '0'

如何从Mongo驱动程序或Mongoose运行它?