vuejs reverse array error infinity loop code example

Example: vuejs reverse array error infinity loop

<!-- 
Array.prototype.reverse actually modifies the array it's applied to.
Vue picks up this change and triggers both v-for to re-evaluate, triggering another .reverse(). That triggers Vue to re-render, causing it to .reverse() etc etc etc etc etc etc etc etc etc etc...
To solve this, use a computed property on a shallow copy of items[] (e.g. using Array destructuring [...this.items] for the reversed list:
-->
<template>
  <div id="app">
    <ul v-for="item in items">
      <li>{{ item }}</li>
    </ul>
    <hr />
    <ul v-for="item in itemsReverse">
      <li>{{ item }}</li>
    </ul>
  </div>
</template>

<script>
new Vue({
  el: '#app',
  data() {
    return {
      items: [1, 2, 3, 4]
    }
  },
  computed: {
    itemsReverse() {
      return [...this.items].reverse()
    }
  }
})
</script>