vue에서 반환된 오류 페이지를 작성하는 방법

<template>
  <div class="error-page">
    <h1>Oops! Something went wrong.</h1>
    <h3>{{ errorMessage }}</h3>
    <p>Error code: {{ errorCode }}</p>
  </div>
</template>

<script>
export default {
  props: {
    errorMessage: {
      type: String,
      default: "An unknown error has occurred."
    },
    errorCode: {
      type: Number,
      default: 500
    }
  }
}
</script>

<style>
.error-page {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  height: 100%;
  text-align: center;
}
</style>

src/
  components/
    ErrorPage.vue
  views/
    Home.vue
    About.vue
  router.js
  App.vue
  main.js

import Vue from 'vue'
import Router from 'vue-router'
import Home from '@/views/Home.vue'
import About from '@/views/About.vue'
import ErrorPage from '@/components/ErrorPage.vue'

Vue.use(Router)

export default new Router({
  mode: 'history',
  routes: [
    { path: '/', name: 'home', component: Home },
    { path: '/about', name: 'about', component: About },
    { path: '/error', name: 'error', component: ErrorPage },
    { path: '*', redirect: '/error' }
  ]
})

<template>
  <div id="app">
    <router-view></router-view>
  </div>
</template>

<script>
export default {
  name: 'App',
  components: {},
  created() {
    // Error handling
    window.addEventListener('unhandledrejection', (event) => {
      this.$router.push({ name: 'error', params: { errorMessage: event.reason }})
    })
    window.addEventListener('error', (event) => {
      this.$router.push({ name: 'error', params: { errorMessage: event.error }})
    })
  },
}
</script>

Promise.reject('An error has occurred.')