Vize
vize:croquis/cf/unused-emit
A declared emit is never used.
Default severity: warning
Applies to: Analyzed component graph and the supported facts described below
Automatic fix: None; review related files and apply the repair
Options: No per-code options; supported CLI findings accept severity overrides
The experimental Rust CrossFileAnalyzer has a producer for this code. The CLI pass does not emit this individual code; configuring its ID does not enable that Rust pass. These scenarios describe the analyzer's supported graph/facts, not a Vite+ promise.
Shared project files
Use these unchanged files in both Bad and Good. Install the imported packages in the project: Vue, plus vue-router or Pinia where shown. Follow any version-specific support note. The entry root makes the component relationship explicit.
main.ts
import { createApp } from "vue";
import Root from "./App.vue";
createApp(Root).mount("#app");
index.html
<div id="app"></div>
<script type="module" src="/main.ts"></script>
Bad
The child declares save but never calls the emitted-event function with that name.
App.vue
<script setup lang="ts">
import Child from "./Child.vue";
</script>
<template><Child /></template>
Child.vue
<script setup lang="ts">
const emit = defineEmits<{ save: [] }>();
</script>
<template><p>Content</p></template>
Good
The example calls emit("save"), making the declared event used. Real interactions should emit it when the corresponding action occurs.
App.vue
<script setup lang="ts">
import Child from "./Child.vue";
</script>
<template><Child /></template>
Child.vue
<script setup lang="ts">
const emit = defineEmits<{ save: [] }>();
emit("save");
</script>
<template><p>Content</p></template>
The Good files demonstrate the change described above; other diagnostics can still apply to the complete project.