How to Fix the ‘TypeError: can’t access dead object’ Error in Our JavaScript App?

Sometimes, we may run into the ‘TypeError: can’t access dead object’ when we’re developing JavaScript apps.

In this article, we’ll look at how to fix the ‘TypeError: can’t access dead object’ when we’re developing JavaScript apps.

Fix the ‘TypeError: can’t access dead object’ When Developing JavaScript Apps

To fix the ‘TypeError: can’t access dead object’ when we’re developing JavaScript apps, we should make sure we check that the object is still available before accessing it.

To do this, we can use the Component.utils.isDeadWrapper method:

if (Components.utils.isDeadWrapper(window)) {
  // dead
}

We can also try to catch exceptions from trying to accessing unavailable objects:

try {
  String(window);
}
catch (e) {
  console.log("window is dead");
}

Conclusion

To fix the ‘TypeError: can’t access dead object’ when we’re developing JavaScript apps, we should make sure we check that the object is still available before accessing it.