Design pattern to check if a JavaScript object has changed

I get from the server a list of objects

[{name:'test01', age:10},{name:'test02', age:20},{name:'test03', age:30}]

I load them into html controls for the user to edit. Then there is a button to bulk save the entire list back to the database.

Instead of sending the whole list I only want to send the subset of objects that were changed.

It can be any number of items in the array. I want to do something similar to frameworks like Angular that mark an object property like "pristine" when no change has been done to it. Then use that flag to only post to the server the items that are not "pristine", the ones that were modified.