this.setAppState

this.setAppState(update, callback)

Like this.setState but for app state instead of component state.

update may be an object or a function.

If update is an object:

• setAppState will merge update into this.appState

If update is a function:

• update must have the form (prevAppState) => newAppState
• setAppState will call update with the current appState value, and will merge the returned newAppState value into appState.

setAppState is not synchronous, and will call callback after it has completed merging update into appState.