Addressing ESLint and TypeScript Issues in Vue.js with Pinia: A comprehensive guide

Question

Addressing ESLint and TypeScript Issues in Vue.js with Pinia: A comprehensive guide

Experiencing difficulties with Vue.js + Pinia and need assistance to resolve these issues.

Error: 'state:' is defined but never used.

Here is the snippet of code located in @/stores/user.ts.

import { defineStore } from 'pinia'

export const useUserStore = defineStore('user', () => {
  state: () => {
    return {
      name: ''
    }
  }
})

https://i.stack.imgur.com/NEOCw.png

Error: Property 'name' does not exist on type 'Store<"user", {}, {}, {}>'

This file is part of the Vue files.

<script setup lang="ts">
import { RouterLink, RouterView } from 'vue-router'
import HelloWorld from '@/components/HelloWorld.vue'
import { useUserStore } from '@/stores/user';

const userStore = useUserStore()

</script>

<template>
  <header>
    < img alt="logo" class="logo" src="@/assets/logo.svg" width="125" height="125" />

    <div class="wrapper">
      <HelloWorld :msg="userStore.name" />

      <nav>
        <RouterLink to="/">Home</RouterLink>
      </nav>
    </div>
  </header>

  <RouterView />
</template>

https://i.stack.imgur.com/4DNEI.png

typescript vue.js eslint pinia

Answer 1

Answer №1

Understanding this aspect of JavaScript syntax can be a bit challenging - when an arrow function includes curly braces, they are considered as the function body. To clarify:

() => {
  state: () => {
    return {
      name: ''
    }
  }
}

is essentially similar to

function () {
  state: () => {
    return {
      name: ''
    }
  }
}

This structure denotes "a function that contains a labeled statement declaring an anonymous arrow function without any further action." If you want to return an object literal, remember to use parentheses to indicate it should be treated as an expression rather than a function body.

export const useUserStore = defineStore('user', () => ({
  state: () => {
    return {
      name: ''
    }
  }
}))

Answer 2

Understanding this aspect of JavaScript syntax can be a bit challenging - when an arrow function includes curly braces, they are considered as the function body. To clarify:

() => {
  state: () => {
    return {
      name: ''
    }
  }
}

is essentially similar to

function () {
  state: () => {
    return {
      name: ''
    }
  }
}

This structure denotes "a function that contains a labeled statement declaring an anonymous arrow function without any further action." If you want to return an object literal, remember to use parentheses to indicate it should be treated as an expression rather than a function body.

export const useUserStore = defineStore('user', () => ({
  state: () => {
    return {
      name: ''
    }
  }
}))

Addressing ESLint and TypeScript Issues in Vue.js with Pinia: A comprehensive guide

Answer №1

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