Any way to pass the value of an event to say an onChange handler?

I am guessing I would need to do something like:

onChange={(event) => {customHandler(event.target.value)}}

onChange={(event) => {customHandler(event.target.value)}}

onChange={(event) => {customHandler(event.target.value)}}

onChange={(event) => {customHandler(event.target.value)}}

Is there a better way to do this?