`html/id-duplication`

Disallow duplicate element IDs

Default severity: error
Presets: essential, happy-path, nuxt, ecosystem, 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": {
        "html/id-duplication": "error"
      }
    },
  },
});

vp run lint

Bad

Both the input and help paragraph declare id="email", so the label target is ambiguous.

<template>
  <label for="email">Email</label>
  <input id="email" />
  <p id="email">Required</p>
</template>

Good

The input keeps email; the help paragraph uses email-help, and aria-describedby refers to that distinct ID.

<template>
  <label for="email">Email</label>
  <input id="email" aria-describedby="email-help" />
  <p id="email-help">Required</p>
</template>

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

Implementation · All rules