How can I send data from parent to child component by vuex store in vue component?

Question

My parent component like this :

Answer 1

Child's mounted hook is executed before parent's mounted hook. ( why? See this link)

console.log(this.getCategory) happens before this.updateCategory(this.category).

Therefore, you get null in the console.

If you put console.log(this.getCategory) in updated hook, you would be getting the right value in the console later on.