DisposableStack.prototype.disposed

The disposed accessor property of DisposableStack instances returns a boolean indicating whether or not this DisposableStack has been disposed or moved by doing any of the following:

• Calling its dispose() method
• Calling its move() method
• Declaring it with using and letting the variable go out of scope, which automatically calls the [Symbol.dispose]() method.

const disposer = new DisposableStack();
console.log(disposer.disposed); // false
disposer.dispose();
console.log(disposer.disposed); // true