Answers for "v-if change class"

bind style with condition in vue

v-bind:style= "[condition ? {styleA} : {styleB}]"

bind style with condition in vue

<figure :style="[item.main_featured ? {'background': 'url(' + item.main_featured + ') center no-repeat'} : {'background': '#FFF'}]">

vue toggle class

<template>
  	<div>
      <div
        class="staticClass"
        v-bind:class="{ active: isActive, 'text-danger': hasError }"
      ></div>
      <!-- OR -->
      <div
           v-bind:class="[isActive ? activeClass : '', errorClass]"
      ></div>
	</div>
</template>

<script>
  export default {
  	data() {
      isActive: true,
      hasError: false,
      activeClass: 'active',
      errorClass: 'text-danger',
    }
  }
</script>

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.