为什么将textContent分配给引用不会在引用更改时更新DOM？

Question

It looks like textContent is a property in Node, but why the below code doesn't work as expected:

http://jsbin.com/ukexab/1/edit

var d = document.getElementById("container");

var data = {text: "something different"};

d.textContent = data.text;

data.text = "new text";

Is this something like copying and not referencing?

Answer 1

Yes, it's due to how assignment works.

Assigning an Object or anything derived from it to a variable will actually assign a reference to that object, and increase the object's reference count.

Assigning a primitive will pass a copy of its value.