When I make a project migration from vue2 to vue3, in the vue3 script setup segment, there is a variable, but I need to access it in the method in export default part which is from vue2 project. If I access it directly, it will throw an error which means ‘undefined’ or ‘not defined’.

I have defined properties in the parent component which are then passed externally to the parent component, how can I use these properties in the child component.

I’m using vue3 with composition api and I receive a props from db as a multidimensional array on page loading like this:

How can I reset a ref and update a v-model which is pointing to child property in my ref?

I have a parent component that passes in an error as a prop.

I wrote a “tree” component in vue3, with some slots to data-display customization.
It works well, but some days ago I found a problem. The case is:

I am trying to add some more properties to each posts data object, posts also has several other fields like links that I do not need to update…

I am a vue3 beginner, I use another class in my code, I want to make the instantiated object responsive, what should I do?

When I’m using ‘ref’ – value doesn’t updating from props.
When using ‘toRef’ – value doesn’t updating from user inputting.

I am creating my first Vue project with Vue3 and ts. But I found any kind of elements writen in the App.vue will be automatically centered in the screen, when the width of page is bigger than 1024.