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) that allows to add handler function to be called on a property change.

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.

752 B Raw Blame History

Observable

752 B

Raw Blame History