pluralize

<div id="app">
  <ul>
    <li v-for="item in arr">{{ item | pluralize('No.') }}</li>
  </ul>
  <ul>
    <li v-for="item in arr">{{ item | pluralize('st', 'nd', 'rd', 'th') }}</li>
  </ul>
</div>

new Vue({
  el: '#app',
  data: {
    arr: [1, 2, 3, 4, 5]
  },
  filters: {
    pluralize(value, ...args) {
      return args.length > 1
        ? value + (args[value % 10 - 1] || args[args.length - 1])
        : args[0] + value
    }
  }
})