Bitrix Framework

It's no longer required to indicate a key for instructions v-if/v-else/v-else-if – Vue does it automatically.

You won't be able to indicate keys manually, but each key must have a unique name.

When using the tag <template> with iterator v-for, the key must be located on this tag instead of its children, as before.

Before:

<template v-for="item in list">
  <div :key="'heading-' + item.id">...</div>
  <span :key="'content-' + item.id">...</span>
</template>

Now:

<template v-for="item in list" :key="item.id">
	<div>...</div>
	<span>...</span>
</template>

You can read more about such this update in the migration guide.

Now v-if has the priority when using v-if jointly with v-for at a single element.

If you have used the instruction v-model, you must read the article about the key changes in the migration guide.