Component Lifecycle: Updating

It cannot access component instances (no 'this' access)
A key limitation of getDerivedStateFromProps is that it cannot access component instances (no 'this' access). Being a static method, it doesn't have access to component instances, meaning you can't call this.setState() or access instance methods. It should be a pure function that returns an object to update state based on props, or null to indicate no state update is needed.
It cannot return null
It only runs during mounting, not updating
It cannot manipulate the DOM