Check out example codes for "vuejs v-for array index". It will help you in understanding the concepts better.
Code Example 1
<ul id="example-1">
<li v-for="item in items" :key="item.message">
{{ item.message }}
</li>
</ul>
Code Example 2
<!-- To gain access to the array index: -->
<ul>
<li v-for="(game, index) in games"></li>
</ul>
<!--
You only want the index in specific cases. Use `:key` as
standard. See the other greps.
-->
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