Let's say you have the following blueprint object and result object.

const blueprintObj = {
    propertyOne: 'One',
    propertyTwo: 'Two',
    propertyThree: 'Three',
    propertyFour: 'Four',
}

const resultObject = {
    propertyOne: 'One',
    propertyThree: 'Three',
    propertyFour: 'Four',
    propertyFive: 'Five'
}

Notice that resultObject is missing propertyTwo but has an extra propertyFive. I've wrote a script to do this for me:

for (const data in resultObject) {
    if (!blueprintObj[data]) {
        delete resultObject[data];
    }
}

for (const data in blueprintObj) {
    if (!resultObject[data]) {
        resultObject[data] = blueprintObj[data];
    }
}

This works... except that resultObject is actually a document in a MongoDB database. How would I do this if blueprintObj was a regular object, and resultObject was a MongoDB document?