WeakRef.prototype.deref()

The deref method returns the WeakRef instance's target object, or undefined if the target object has been garbage-collected.

The target object of the WeakRef, or undefined if the object has been garbage-collected.

See the Notes on WeakRefs section of the WeakRef page for some important notes.

See the Examples section of the WeakRef page for the complete example.

const tick = () => {
  // Get the element from the weak reference, if it still exists
  const element = this.ref.deref();
  if (element) {
    element.textContent = ++this.count;
  } else {
    // The element doesn't exist anymore
    console.log("The element is gone.");
    this.stop();
    this.ref = null;
  }
};

• WeakRef