Vuetify Confirm Dialog component that can be used locally or globally

Confirm.vue

<template>
  <v-dialog v-model="dialog" :max-width="options.width" :style="{ zIndex: options.zIndex }" @keydown.esc="cancel">
    <v-card>
      <v-toolbar dark :color="options.color" dense flat>
        <v-toolbar-title class="white--text">{{ title }}</v-toolbar-title>
      </v-toolbar>
      <v-card-text v-show="!!message" class="pa-4">{{ message }}</v-card-text>
      <v-card-actions class="pt-0">
        <v-spacer></v-spacer>
        <v-btn color="primary darken-1" text @click.native="agree">Yes</v-btn>
        <v-btn color="grey" text @click.native="cancel">Cancel</v-btn>
      </v-card-actions>
    </v-card>
  </v-dialog>
</template>

<script>
/**
 * Vuetify Confirm Dialog component
 *
 * Insert component where you want to use it:
 * <confirm ref="confirm"></confirm>
 *
 * Call it:
 * this.$refs.confirm.open('Delete', 'Are you sure?', { color: 'red' }).then((confirm) => {})
 * Or use await:
 * if (await this.$refs.confirm.open('Delete', 'Are you sure?', { color: 'red' })) {
 *   // yes
 * }
 * else {
 *   // cancel
 * }
 *
 * Alternatively you can place it in main App component and access it globally via this.$root.$confirm
 * <template>
 *   <v-app>
 *     ...
 *     <confirm ref="confirm"></confirm>
 *   </v-app>
 * </template>
 *
 * mounted() {
 *   this.$root.$confirm = this.$refs.confirm.open
 * }
 */
export default {
  data: () => ({
    dialog: false,
    resolve: null,
    reject: null,
    message: null,
    title: null,
    options: {
      color: 'primary',
      width: 290,
      zIndex: 200
    }
  }),
  methods: {
    open(title, message, options) {
      this.dialog = true
      this.title = title
      this.message = message
      this.options = Object.assign(this.options, options)
      return new Promise((resolve, reject) => {
        this.resolve = resolve
        this.reject = reject
      })
    },
    agree() {
      this.resolve(true)
      this.dialog = false
    },
    cancel() {
      this.resolve(false)
      this.dialog = false
    }
  }
}
</script>

Here is the TypeScript version

import { defineComponent, reactive, toRefs } from "@vue/composition-api";

interface Options {
  color: string;
  width: number;
  zIndex: number;
}

export default defineComponent({
  setup() {
    const state = reactive({
      dialog: false,
      resolve: (val: boolean) => {},
      reject: (val: boolean) => {},
      message: "",
      title: "",
      options: {
        color: "primary",
        width: 290,
        zIndex: 200,
      },
    });

    const open = (title: string, message: string, options: Options) => {
      state.dialog = true;
      state.title = title;
      state.message = message;
      state.options = Object.assign(state.options, options);
      return new Promise<boolean>((resolve, reject) => {
        state.resolve = resolve;
        state.reject = reject;
      });
    };

    const agree = () => {
      console.log("confirm");
      state.resolve(true);
      state.dialog = false;
    };

    const cancel = () => {
      console.log("cancel");
      state.resolve(true);
      state.dialog = false;
    };

    return {
      ...toRefs(state),
      open,
      agree,
      cancel,
    };
  },
});

Call it this way using TypeScript:

<template>
  <div>
    <v-btn icon color="red" @click="openConfirm">
      <v-icon>mdi-trash-can-outline</v-icon>
    </v-btn>
    <confirm ref="veeConfirmRef"></confirm>
  </div>
</template>
<script lang="ts">
import { onMounted, ref } from "@vue/composition-api";
import Confirm from "@/components/Confirm.vue"

export default {
  components: {
    Confirm,
  },

  setup() {
    const veeConfirmRef = ref<InstanceType<typeof Confirm>>();

    onMounted(() => {
      console.log('page onMounted')
    });

    const openConfirm = ()=> {
      veeConfirmRef
        .open('Delete', 'Are you sure?', { color: "error" })
        .then(confirm => {
          console.log("onBeforeDeleteItem confirm : " + confirm);
        });
    };

    return{
      openConfirm,
      veeConfirmRef,
    }
  }
};
</script>

I'm getting the following error after upgrading some dependencies i.e nuxtjs.

TypeError: Cannot read property 'open' of undefined
    at VueComponent.mounted (default.vue?ec86:160)
    at invokeWithErrorHandling (vue.runtime.esm.js?2b0e:1854)
    at callHook (vue.runtime.esm.js?2b0e:4219)
    at Object.insert (vue.runtime.esm.js?2b0e:3139)
    at invokeInsertHook (vue.runtime.esm.js?2b0e:6346)
    at Vue.patch [as __patch__] (vue.runtime.esm.js?2b0e:6565)
    at Vue._update (vue.runtime.esm.js?2b0e:3945)
    at Vue.updateComponent (vue.runtime.esm.js?2b0e:4060)
    at Watcher.get (vue.runtime.esm.js?2b0e:4479)
    at new Watcher (vue.runtime.esm.js?2b0e:4468)
    ```
    
    The error is at following lines
    ```
    mounted() {
    this.$root.$confirm = this.$refs.confirm.open
    this.$root.$toast = this.$refs.toast.open
  },

this.$root.$confirm = this.$refs.confirm.open

Having same issue. How can we use this in nuxt globally. something like this.$root.$ref.dialog.open()

Just to add to the comments .. I registered this component globally based off of the Vue 2 documentation and use it all over vs adding it to the App.vue. This way I was able to use it as initially described.

// in your main.js before you instantiate your new Vue({}) application:
import ConfirmDialog from "@/components/shared/ConfirmDialog"
Vue.component('ConfirmDialog', ConfirmDialog)

// in <template>:
// <ConfirmDialog ref="confirm"></ConfirmDialog>

// Call it:
this.$refs.confirm.open('Delete', 'Are you sure?', { color: 'red' }).then((confirm) => {})
// Or use await:
if (await this.$refs.confirm.open('Delete', 'Are you sure?', { color: 'red' })) {
  // yes
} else {
  // cancel
}

If you are using the Composition API plugin, you can use provide/inject plus a useDialog composable that injects the show dialog function. Cleanest and TypeScript friendly!

Here's how you would call it:

<script lang="ts">
import { defineComponent } from '@nuxtjs/composition-api';
import { useDialog } from '~/composables';

export default defineComponent({
  setup() {
    const createConfirmDialog = useDialog();

    const handleDelete = async () => {
      try {
        const shouldProceed = await createConfirmDialog(
          'Confirm',
          'Delete this post?',
          { width: 300 }
        );
      } catch (_e) {}
    };

    return {
      handleDelete
    };
  },
});
</script>

Full implementation here: https://gist.github.com/wobsoriano/1e63708d7771c34f835c0f6e3c5e731a

Standing on the shoulders of the giants before me, I was able to get a global confirmation function working with Nuxt.js:

1. In the layout component where the dialog is place:

   <app-confirmation-dialog ref="confirm" />
   ...
     //because I'm using Class based components I used an `@Ref()` shorthand, but using $refs in the RH side of the assignment below should work too:
    @Ref()
     readonly confirm!: AppConfirmationDialog
   ...
     // the real magic??
      mounted(): void {
       this.$nuxt.$root.$confirm = this.confirm.open
     }

2. Its usage in other components:

   await this.$root.$confirm(
           'Skip Day',
           'Are you sure you want to toggle the Skip Day status?',
           {
             color: 'red',
           })

3. Most likely because I am using Typescript I had to add a Nuxt plugin with:

   import { Options } from '@/types'
   
   declare module 'vue/types/vue' {
     interface Vue {
       $confirm(title: string, message: string, options: Options): Promise<boolean>
     }
   }

4. and I had a type defined in a file shared between the plugin and the other components:

   export interface Options {
     color?: string
     width?: number
     zIndex?: number
   }

Why use @click.native when @click seems to do the trick? Is there any scenario when a simple @click is not enough?

If you need to implement it on vue3+vuetify3, you can refer to this article https://juejin.cn/post/7102240700774744095

<v-dialog
  v-model="dialog"
  @update:model-value="atDialogUpdate"
>

Add this function inside confirm dialog component so it will resolve with false if dialog is closed by clicking outside

function atDialogUpdate(val) {
  if (!val) {
    resolve(false);
  }
}

If using in multiple places then confirmDialog component can be placed in root #app component like this

<div id='#app'>
  <confirmDialog :ref='store.setConfirmDialogRef' />
</div>

then in pinia store or any shared state

state: () => ({
  confirmDialogRef: null,
}),
actions: {
  setConfirmDialogRef(val) {
    this.confirmDialogRef = val;
  },
}

The store.setConfirmDialogRef method will update ref in store.
then in any function

async function submit() {
  if (!await store.confirmDialogRef.open(
    "You sure?",
    "Positive?",
  )) {
    return;
  }
  // axios.post
}