function handleClick()

in 07 - Returning State/01 - Stateful Functions.js [8:18]

• 9 lines of code
• 4 McCabe index (conditional complexity)

function handleClick(props, state, event) {
  if (event.button === 1) {
    // Middle click resets state to zero
    return { count: 0 };
  }
  // Callbacks to external components may be fired
  if (props.onClick) {
    props.onClick();
  }
  return { count: state ? state.count + 1 : 0 };
}