doccano/frontend/layouts/error.vue

<template>
  <v-app dark>
    <v-container
      fill-height
      style="height: calc(100vh - 58px);"
    >
      <v-layout align-center>
        <v-flex text-center>
          <h1 class="display-2 primary--text">
            Whoops, 404
          </h1>
          <p>The page you were looking for does not exist</p>
          <v-btn
            to="/"
            outlined
            color="primary"
          >
            Get me out of here!
          </v-btn>
        </v-flex>
      </v-layout>
    </v-container>
  </v-app>
</template>

<script>
export default {
  layout: 'empty',
  props: {
    error: {
      type: Object,
      default: null
    }
  },
  head() {
    const title =
      this.error.statusCode === 404 ? this.pageNotFound : this.otherError
    return {
      title
    }
  },
  data() {
    return {
      pageNotFound: '404 Not Found',
      otherError: 'The page you were looking for wasn\'t allowed to access.'
    }
  }
}
</script>