JavaScript How to delete key from copied object? [duplicate]

Answer 1

You aren't duplicating q, instead, you're copying a reference to different variable.

Both q and duplicateQ point to the same object, the same location in your computer's memory.

In order to make this work, you're going to have to clone the object, then you can delete (/ modify) individual properties on the separate variables.

A quick-and-dirty example:

var a = { a: 1, b: 2 },
    b = JSON.parse(JSON.stringify(a));

delete b.a;

document.body.textContent = JSON.stringify(a) + ' ' + JSON.stringify(b);