@ZackArgyle 1. Start with plain React. 2. Lift state as needed. 3. Still feeling pain? Use Redux/Context/etc.

  • Currently, both components independently keep their values in the local state: – – However, we want these two inputs to be in sync with each other.
  • Since the props of both components are coming from the same parent component, the two inputs will always be in sync.
  • It will handle the change by modifying its own local state, thus re-rendering both inputs with the new values.
  • For example, if we enter 37 into the Celsius input, the state of the component will be: – – If we later edit the Fahrenheit field to be 212, the state of the will be: – – We could have stored the value of both inputs but it turns out…
  • The inputs stay in sync because their values are computed from the same state: – – Try it on CodePen.

Often, several components need to reflect the same changing data. We recommend lifting the shared state up to their closest common ancestor. Let’s see how this works in action.
Continue reading “@ZackArgyle 1. Start with plain React.
2. Lift state as needed.
3. Still feeling pain? Use Redux/Context/etc.”