10000 False positive for unused vars inside decorator arguments · Issue #445 · eslint/typescript-eslint-parser · GitHub
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This repository was archived by the owner on Jan 19, 2019. It is now read-only.
This repository was archived by the owner on Jan 19, 2019. It is now read-only.
False positive for unused vars inside decorator arguments  #445
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@yyx990803

Description

@yyx990803

What version of TypeScript are you using?
2.6.1

What version of typescript-eslint-parser are you using?
12.0.0

What code were you trying to parse?

import { Component, Vue } from 'vue-property-decorator';
import HelloWorld from './components/HelloWorld.vue';

@Component({
  components: {
    HelloWorld
  }
})
export default class App extends Vue {}

What did you expect to happen?
With eslint-plugin-typescript's typescript/no-unused-vars rule enabled, should lint without errors.

What happened?

error: 'HelloWorld' is defined but never used (no-unused-vars)

It looks like the expression in a decorator's argument position is not taken into context when determining unused vars. Also, when using eslint --fix, code inside decorator arguments are sometimes not formatted correctly.

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