Updating state on props change in React Form

Question

I am having trouble with a React form and managing the state properly. I have a time input field in a form (in a modal). The initial value is set as a state variable in

Answer 1

Apparently things are changing.... getDerivedStateFromProps() is now the preferred function.

class Component extends React.Component {
  static getDerivedStateFromProps(props, current_state) {
    if (current_state.value !== props.value) {
      return {
        value: props.value,
        computed_prop: heavy_computation(props.value)
      }
    }
    return null
  }
}

(above code by danburzo @ github )