conditionally before after class in vuejs code example

Example 1: conditional class vue

<template>
  <span
    class="description"
    :class="darkMode ? 'dark-theme' : 'light-theme'"
  >
    This is how you add dynamic classes in Vue.
  </span>
</template>

Example 2: vue class binding

<div v-bind:class="[{ active: isActive }, errorClass]"></div>