Event in Vue on rendering of a specific div?

Question

Vue.js

How is the event of the appearance / rendering of some block hung or simulated in Vue?
I have a block with the condition v-if="" , it is necessary that if this block appears, then execute a certain script.
You need to do it without components (I think it could be pushed into mounted there)

Answer 1

v-if="isBlockVisible"

computed: {
  isBlockVisible() {}
},
watch: {
  isBlockVisible() {}
}