Observable

Create a function makeObservable(target) that "makes the object observable" by returning a proxy.

Here's how it should work:

function makeObservable(target) {
  /* your code */
}

let user = {};
user = makeObservable(user);

user.observe((key, value) => {
  alert(`SET ${key}=${value}`);
});

user.name = "John"; // alerts: SET name=John

In other words, an object returned by makeObservable has the method observe(handler).

Whenever a property changes, handler(key, value) is called with the name and value o the property.

P.S. In this task, please handle only writing to a property. Other operations can be implemented in a similar way. P.P.S. You might want to introduce a global variable or a global structure to store handlers. That's fine here. In real life, such function lives in a module, that has its own global scope.

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Observable

872 B

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