script/no-unused-emit-declarations

Flag declared events that are never emitted

Bad · Good

Default severity: warning
Presets: none
Automatic fix: None; review the suggested change
Applies to: JS/TS scripts in Vue SFCs; examples show the relevant Options API or script setup form
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": {
        "script/no-unused-emit-declarations": "warn"
      }
    },
  },
});

vp run lint

Bad

defineEmits declares both change and unused, but the captured emit function only emits the literal event change.

<script setup lang="ts">
const emit = defineEmits(['change', 'unused'])
emit('change')
// `unused` is never emitted
</script>

Good

Removing unused makes the declared event list match the observed emission. The example uses a captured, unescaped emit binding so this local usage conclusion is available.

<script setup lang="ts">
const emit = defineEmits(['change'])
emit('change')
</script>

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

Implementation · All rules