Node Driver MongoDb - handleCallbaak is not defined instead of catch() firing - node.js

Question

Using Node 8.* and MongoDb driver mongodb#2.2.31
I am testing the my code base to see how it behaves if my MongoDB ever crashes. The way I test is to turn the MongoDB daemon off.
The catch() statement is not executing. Instead I get the mongodb driver error ReferenceError: handleCallbaak is not defined when mongo.tempUsers.add(body, token, password) executes.
Why is this? Shouldn't the catch() execute?
TempUsers.prototype.add = function(body, token) {
const user = { "email" : body.email };
return this.collection.updateOne(user,
{ $set: {
"token": token,
"createdAt": new Date(),
}
},
{
writeConcern: true,
maxTimeMS: QUERY_TIME,
upsert: true
}
);
const confirmUser = (body, password) => {
const token = uuidv4();
const result = mongo.tempUsers.add(body, token, password);
result.then(() => sendConfirmationEmail(body, token)).catch(e => console.log(e));
};
UPDATE: How my own collections object is created:
var collections = {
tempUsers: false
};
function connect(dbURI) {
return MongoClient
.connect(dbURI)
.then(function(db) {
console.log(colors
.bold('MongoDB default connection open to ' + dbURI));
initDbListeners(db);
initCollections(db);
return db;
})
.catch(function(err) {
console.log(colors
.red(err));
});
}
function initCollections(db) {
collections.tempUsers = new TempUsers(db);
}
module.exports.collections = collections;
/home/one/github/dolphin/node_modules/mongodb/lib/collection.js:1057
if(err) return handleCallbaak(callback, err, null);
^
ReferenceError: handleCallbaak is not defined
at Object.c (/home/one/github/dolphin/node_modules/mongodb/lib/collection.js:1057:13)
at Store.flush (/home/one/github/dolphin/node_modules/mongodb/lib/topology_base.js:68:30)
at Server.reconnectFailedHandler (/home/one/github/dolphin/node_modules/mongodb/lib/server.js:290:18)
at emitOne (events.js:115:13)
at Server.emit (events.js:210:7)
at Pool.<anonymous> (/home/one/github/dolphin/node_modules/mongodb-core/lib/topologies/server.js:324:14)
at emitOne (events.js:115:13)
at Pool.emit (events.js:210:7)
at Connection.<anonymous> (/home/one/github/dolphin/node_modules/mongodb-core/lib/connection/pool.js:317:16)
at emitTwo (events.js:125:13)
at Connection.emit (events.js:213:7)
at Socket.<anonymous> (/home/one/github/dolphin/node_modules/mongodb-core/lib/connection/connection.js:187:49)
at Object.onceWrapper (events.js:316:30)
at emitOne (events.js:115:13)
at Socket.emit (events.js:210:7)
at emitErrorNT (internal/streams/destroy.js:64:8)

Answer 1

The mongodb node_modules/mongodb/lib/collection.js file on your system is different from the released file.
Remove the /home/one/github/dolphin/node_modules/mongodb directory from your project and run npm install again.