Accessing individual object element under ux

I have this in javascript:

Posts.value = responseObject;
console.log("Post title: " + Posts._values[0].issue_Posts[1].Title);

note: ‘_values’ is automatically added to the object)

how do I access the same element under UX? (without iterating with Each)

{Posts.issue_Posts[1].Title}

doesn’t works.
I’v tried many combinations with no success.

I don’t think this is possible. But you can make your JS export what you want to consume directly in this case; i.e export Posts._values[0].issue_Posts[1].Title somewhere suitable in your data model.