When creating nested objects, the defineproperty function on the object prototype does not trigger

Exploring and experimenting to unravel the workings of this feature, but I find myself puzzled by this particular scenario.

Object.defineProperty(Object.prototype, 'a', {set: function() {console.log("Set!");} });

Based on my understanding, whenever I create an object named "a," that function should be triggered. It seems to work when done like this:

a = {};
Set!

However, it doesn't behave the same when nested within another object:

test = {a:{}};

Could there be something I'm misinterpreting?

javascriptobjectdefineproperty

Answer №1

When using the object literal {a: …}, a new object is created with its own property. This method does not trigger any inherited setters during the property creation process, partly as a safety measure to prevent JSON hijacking.

To achieve the desired behavior, you can use the following code:

test = {};
test.a = {};

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