type/no-meaningless-void-operator

Disallow void operators on expressions that are already void-like.

Applies to: Type information in Vue SFC scripts and templates, for the constructs shown below.

This rule reads type information from your TypeScript project (tsconfig.json), so the configuration sets typeAware: true. typeAware does not turn on opt-in rules by itself.

Bad

logVoid() is already void, so the void operator does not change the result.

<script setup lang="ts">
function logVoid(): void {}
void logVoid();
</script>

Good

getNumber() returns a Promise, so void discards that thenable on purpose.

<script setup lang="ts">
function getNumber(): Promise<number> {
  return Promise.resolve(1);
}
void getNumber();
</script>

Configuration (Vite+)

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

export default defineConfig({}).withVue({
  linter: {
    "preset": "incremental",
    "rules": {
      "type/no-meaningless-void-operator": "warn"
    },
    "typeAware": true
  },
});

Then run vp run lint.

Related

• Type and script rules
• Rule options
• All rules
• Source code