vue2.7.8 use<script setup> how to transfer data from child to parent?

[ufoozhenghao]

In <script>, it's ok to transfer data to parent via use setup({emit}), but if i use <script setup>. parent component can't get emit from child. I tried to use defineEmits or eventbus，they didint work.

how to tansfer data if i want use it in <script setup>?

[LinusBorg]

See: https://vuejs.org/guide/components/events.html#declaring-emitted-events

(make sure to switch the docs content to "composition API" in the upper left)