How to make updating an object inside an array reactive?

Question

Vue.js

Good afternoon, colleagues. Something got confused.
The question is how to make a reactive update of an object placed in an array.
For example we have a structure:

data: function () {
            return {  
  list: [
           {param1: 'data',  param2 : 'qwer' ...}, 
           {param1: 'data2' param2: 'qwer' ...}
          ]
}}

How can param1 and param2 be changed and tracked?
The documentation says about Vue.set, but there is a construction (element, index, value).
That is, you can only change the object itself by index in the array, and not its properties. Maybe I'm stupid, but I just can't figure out how to update directly without a proxy object that needs to be filled with data and already assigned.

Answer 1

In fact, set is not needed at all in this case. Those properties that are in the object in data at the time the component instance is created become reactive by default: tyk .
Set should be used only for those properties that did not exist yet.