`vue/no-negated-v-if-condition`

Disallow a negated v-if condition when the chain has a v-else

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-negated-v-if-condition": "warn"
      }
    },
  },
});

vp run lint

Bad

The paired v-if and v-else branches begin with a negated condition.

<template>
<div v-if="!ok">A</div>
<div v-else>B</div>
</template>

Good

A positive ok condition comes first; when inverting a condition, place the original opposite branch first. A lone negated v-if and !== comparisons remain allowed.

<template>
<div v-if="ok">B</div>
<div v-else>A</div>

<div v-if="!ok">A</div>

<div v-if="a !== b">A</div>
<div v-else>B</div>
</template>

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

Implementation · All rules