How to properly join Object?

Question

JavaScript

There are two objects that need to be combined into one.

(string)=>{
    var subDocString = that.state.subDocString;
    var assignSubDocString = {subDocString, string};
    //записали в новую переменную старое или пустое значение,
   // создали новый обьект и записали оба                                               
 that.setState({ subDocString: assignSubDocString});
}

assignSubDocString == {"subDocString":{"stack": ....}, "string":{"stack": ....}}

it goes like this, but it needs to

assignSubDocString == {{"stack": ....}, {"stack": ....}}

How to do this?

Answer 1

And so you will not succeed, the elements of the object require a key. Use arrays [{},{}]

Answer 2

Come on like this

var assignSubDocString = Object.assign(subDocString, string);