<template v-for> key should be placed on the <template>

element, not on the element being repeated. For example:

<template v-for="item in items" :key="item.id">
  <div>{{ item.name }}</div>
</template>

In this example, the `key` attribute is placed on the `template` element and binds to the `id` property of each item in the `items` array. This helps Vue.js to efficiently update the DOM when the array changes.

相关问题

<template v-for> key should be placed on the <template> tag.

Yes, in Vue.js, the `key` attribute should be placed on the element that is being repeated, not on the `<template>` tag itself. The `key` attribute is used to give each item in the list a unique identifier, allowing Vue.js to efficiently update and re-render the list when it changes.

Here's an example of how to use the `key` attribute correctly with the `v-for` directive:

<template v-for="item in items" :key="item.id">
  <div>{{ item.name }}</div>
</template>

In this example, the `key` attribute is placed on the `<div>` element, which is the element being repeated in the loop. The value of `item.id` is used as the unique identifier for each item in the list.

By using the `key` attribute correctly, you can help Vue.js optimize the rendering of lists and improve performance.

<template v-for> key should be placed on the <template> tag

As an AI language model, I cannot give you a definitive answer without more context. However, here is some general information regarding the use of the "key" attribute in Vue.js and the "v-for" directive:

In Vue.js, the "key" attribute is used to help Vue.js identify which items in a list have changed, been added, or been removed. This is important for Vue.js to efficiently update the DOM when changes occur in the data.

When using the "v-for" directive to loop through a list of items, it is recommended to add a "key" attribute to the element being looped. This helps Vue.js keep track of the elements and their states.

In some cases, it may be necessary to use the "key" attribute on a <template> tag when using "v-for". This is because the <template> tag is a non-rendering element that can be used to group multiple elements together.

However, the specific use case and implementation details will depend on the specific scenario and requirements. It is recommended to consult the Vue.js documentation and best practices for more information.