Confirmation Dialogue Vue: Promises Undefined

I created a Confirmation Dialogue modal, when I go to call the modal the Promises from undefined and it executes the entire piece of code I would like that x piece of code to be executed only when I answered in the modal

I created the following modal:

<template>
    <t-modal @before-open="onBeforeOpen" :name="modalName" :header="title example"
             @closed="onClosed" :click-to-close="false">
        <div class="col-span-1 md:col-span-2 text-center text-lg"
             v-html="pippo"/>
        <div class="flex justify-end mb-2 md:col-span-2">
            <t-button class="px-8" variant="primary" @click="submit">
                <span  class="text-lg"></span> {{ example }}
            </t-button>
        </div>

    </t-modal>
</template>

<script>
import {modal} from "../modal";

export default {
    name: "ConfirmChanges",
    components: {},
    mixins: [modal],
    data() {
        return {
            generating: [],
            checked: false,
            submitting: false,
            modalName: 'confirm-changes',
            resolvePromise: undefined,
        }
    },
    methods: {
        onBeforeOpen() {
            return new Promise((resolve) => {
                console.log(resolve)
                this.resolvePromise = resolve
            })
            console.log(this.resolvePromise)
        },
        submit() {
            this.resolvePromise(true)
            console.log('submit',this.resolvePromise)
            this.$modal.hide(this.modalName)
        },
        onClosed() {
            this.resolvePromise(false)
            this.$modal.hide(this.modalName)
        },

    }
}
</script>

<style scoped>

</style>

then i call the modal inside this method inside a component.

async switchEdit() {

       const check = await this.$modal.show('confirm-changes')

       if(check){
         //I would like this piece of code to be executed only when the Promises 
         //resolves to true.
         //unfortunately it executes me all the method as soon as the modal is opened
       }
    },