fade out old element, fade in new

Question

I am new to react and have tried react animations. They work great when elements are added or removed in a TransitionGroup. But if I replace a single element with a similar one, react detects that the content of that element has changed and does not trigger an animation.

How can I fade out a single element and fade in a new one in the same place? For example fade out login-div, fade in dashboard-div.

Answer 1

If your elements have different key attributes, TransitionGroup will unmount one and mount the other.

You can read more about keys here: Composition vs Inheritance.