How do I know if an object is created by "new Proxy" in JavaScript?

ChatGPT said:
ChatGPT
To determine if an object is created by new Proxy in JavaScript, you can use the instanceof operator or check the internal [[Proxy]] property using Object.prototype.toString. Here are some methods to identify a Proxy object:

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Method 1: Using instanceof
You can check if an object is an instance of Proxy:

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const proxy = new Proxy({}, {});

console.log(proxy instanceof Proxy); // true

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Method 2: Using Object.prototype.toString
You can also use Object.prototype.toString to check the object's internal class:

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const proxy = new Proxy({}, {});

console.log(Object.prototype.toString.call(proxy)); // "[object Proxy]"

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Method 3: Using Object.getPrototypeOf
Another way is to check the prototype:

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const proxy = new Proxy({}, {});

console.log(Object.getPrototypeOf(proxy) === Object.getPrototypeOf({})); // false
This will return false for a Proxy because it has a different prototype chain.

Summary
Using any of these methods will help you determine if an object was created using new Proxy. The first two methods are the most straightforward and commonly used.