`vue/no-array-index-key`

Disallow using the v-for index variable directly as the :key

Default severity: warning
Presets: nuxt, opinionated
Automatic fix: None; review the suggested change
Applies to: Vue SFC templates and blocks, with script context where the rule requires it
Options: No rule-specific options. Severity and preset selection are configurable.

Configuration (Vite+)

import { defineConfig } from "@vizejs/vite-plugin/vite-plus";

export default defineConfig({
  lint: {
    vize: {
      "preset": "incremental",
      "rules": {
        "vue/no-array-index-key": "warn"
      }
    },
  },
});

vp run lint

Bad

The list key is its current index, so item identity changes when the list is reordered.

<template>
<li v-for="(item, index) in items" :key="index">{{ item.name }}</li>
</template>

Good

The key comes from item.id, preserving the identity of each item across position changes.

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

Good avoids this rule's finding under the configuration above; other rules may still report diagnostics.

Implementation · All rules