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

Question

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?

javascript object defineproperty

Answer 1

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 = {};

Answer 2

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 = {};

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

Answer №1

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