Check whether all that information about forms in React and TypeScript has stuck by trying the following implementations:

1. Extend our generic Field component to include a number editor, using the native number input.
2. Implement an urgency field on the Contact Us form to indicate how urgent a response is. The field should be numeric.
3. Implement a new validator function in the generic Form component, which validates whether a number falls between two other numbers.

4. Implement a validation rule on the urgency field to ensure the input is a number between 1 and 10.
5. Our validation triggers when a user clicks in and out of a field without typing anything. How can we trigger validation when a field loses focus, but only when it has been changed?