How to add a class on the interface based on the condition of the returned data in VueJS

Question

Interface :

How when the index of the returned record is an even number the Row-reverse class is added ?

Answer 1

You can simply achieve that by binding a class attribute dynamically in the element based on the JS expression.

:class="index % 2 == 0 ? 'product row-reverse' : 'product'"

Live Demo :

new Vue({
  el: '#app',
  data: {
    items: ['Item 1', 'Item 2', 'Item 3', 'Item 4', 'Item 5', 'Item 6']
  }
})

.row-reverse {
  background-color: yellow;
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.5.17/vue.js"></script>
<div id="app">
  <li :class="index % 2 == 0 ? 'product row-reverse' : 'product'" v-for="(item, index) in items" :key="index">{{ item }}</li>
</div>