Answers for ":class="[ vue conditional"

conditional class vue

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

vue class binding if else

vue class binding if else
<div :class="{ 'prop-name': boolVar }"></div>
:class="darkMode ? 'dark-theme' : 'light-theme'"
If darkMode is true, we apply dark-theme as our class name. 
	Otherwise we choose light-theme.