How to make variable change animation Vue?

Question

Animation

Let's say I have a variable a. Initially, it is equal to 1. After some manipulation with the data, it changed its value, for example, to 2. The value of this variable is displayed on the screen. How to apply animation to it, for example, first the block with the change will become larger, and then return to its original position.

Answer 1

https://ru.vuejs.org/v2/guide/transitions.html
https://vuejsexamples.com/tag/animation/