Can v-if and v-for be used together in vue?

Yes, v-if and v-for can be used together. Nest v-if inside v-for. v-for has higher priority than v-if, so v-if only takes effect on elements rendered by v-for. This allows conditional rendering of specific elements in a loop.

v-if and v-for can be used together in Vue

v-if and v-for are Two of the most commonly used directives in Vue. v-if is used to render elements conditionally, while v-for is used to iterate through the data and render the template for each element.

Using v-if and v-for together

To use v-if and v-for together, just nest them together. For example:

<div v-if="条件">
  <ul>
    <li v-for="item in items">{{ item }}</li>
  </ul>
</div>

This code will check whether the condition is true. If true, renders the <div> containing <ul>. <li> elements will iterate over the items array and render its value for each element.

Note: v-for has higher priority than v-if. This means that v-for will always execute first and then render the result based on v-if's condition.

Example:

A common usage scenario is to render a list, but only display the list when certain conditions are met.

<template>
  <div>
    <h2 v-if="items.length">我的列表：</h2>
    <ul v-if="items.length">
      <li v-for="item in items">{{ item }}</li>
    </ul>
    <p v-else>没有任何项目</p>
  </div>
</template>

<script>
export default {
  data() {
    return {
      items: ['苹果', '香蕉', '橘子']
    }
  }
}
</script>

In this code, we only render the list if the items array is not empty. Otherwise, we display a message stating that there are no items.

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