how to change value in mongodb code example

Example 1: mongodb update

db.collectionName.update({"aField":"vale1"},{$set:{"anotherField":"value2"}})

-search for documentations for more examples than search
-aField is used to find the documents
-anotherField is the field that will be updated
-You can also use the below:
-- updateOne
-- findOneAndUpdate

Example 2: add property to all documents mongo

db.myCollection.update({}, {$set: {"isOpen": false}}, false, true)