Why v-for with v-if precedence in Vue? - Purpose & Use Cases

The Big Idea

Discover why the order of v-for and v-if can make or break your Vue list rendering!

The Scenario

Imagine you have a list of items and want to show only some of them based on a condition. You try to loop through the list and check the condition for each item manually in your template.

The Problem

Manually filtering items inside a loop can cause confusion and mistakes. You might accidentally render unwanted items or write repetitive code. It's hard to control which runs first: the loop or the condition.

The Solution

Vue's v-for and v-if directives have a clear order: v-for runs first, then v-if filters items. This makes your code predictable and clean, letting Vue handle the logic efficiently.

Before vs After

✗ Before

<ul>
  <li v-for="item in items">
    <template v-if="item.show"> {{ item.name }} </template>
  </li>
</ul>

✓ After

<ul>
  <li v-for="item in items" v-if="item.show"> {{ item.name }} </li>
</ul>

What It Enables

This lets you easily display only the items you want from a list, keeping your templates simple and your app fast.

Real Life Example

Think of a shopping app showing only products in stock. Using v-for with v-if lets you loop through all products but display only those available to buy.

Key Takeaways

v-for runs before v-if, so the loop happens first.

This order helps you filter items cleanly inside your template.

It avoids manual filtering and keeps your code simple and clear.