Users.vue

<template>
    <div>
        <div v-for="user in users" :key="user.id">
            <user-profile-modal
                :show="showModal(user.id)" 
                @close="toggleModal(user.id)" />

            <a class="text-sm" href="#" @click.stop="toggleModal(user.id)">Show</a>
        </div>
    </div>
</template>

<script>
    import UserProfileModal from './UserProfileModal.vue'

    export default {
        components: { UserProfileModal },

        data() {
            return {
                activeModal: 0,
            }
        },

        methods: {
            showModal: function(id) {
                return this.activeModal === id 
            },

            toggleModal: function (id) {
                if(this.activeModal !== 0) {
                    this.activeModal = 0
                    return false
                }
                this.activeModal = id
            }
        }
    }
</script>