# mounted property

bool mounted
inherited

Whether this `State` object is currently in a tree.

After creating a `State` object and before calling initState, the framework "mounts" the `State` object by associating it with a `BuildContext`. The `State` object remains mounted until the framework calls dispose, after which time the framework will never ask the `State` object to build again.

It is an error to call setState unless mounted is true.

## Implementation

    bool get mounted => _element != null;