Can I use JavaScript ES6 Proxy to observe when an object is created

Question

I would like to be able to observe when a global object gets created.

I was hoping to do something with JavaScript Proxy.

let objectA = undefined;

...  Proxy code here

A little while later...

objectA = { prop1: 'hello', prop2: 'world' }

... proxy code gets called here... console.log(objectA)

Not if you're creating your object as a literal like that, no. If you have a class or a function with a constructor, you can use the construct trap. — Heretic Monkey
– Heretic Monkey, Commented Jan 31, 2019 at 20:54

Bergi · Accepted Answer · 2019-01-31 21:28:10Z

1

I would like to be able to observe when a global object gets created. I was hoping to do something with JavaScript Proxy.

No, Proxy doesn't do that. A proxy is an already existing object, and you cannot wrap the global object (window) in a proxy either.

You could however install a setter on window.

answered Jan 31, 2019 at 21:28

Bergi

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