Exploring the power of props in Vue3/Nuxt3: A guide to utilizing props directly in the

Could you assist me in resolving this issue : When accessing a value from the props within the root scope of <script setup>, reactivity is lost (vue/no-setup-props-destructure)

The technologies I am using include :

  • nuxt: "^3.6.5"
  • typescript: "^5.1.6"
  • eslint: "^8.46.0
  • eslint-config-prettier: "^8.10.0"
  • eslint-plugin-nuxt: "^4.0.0"
  • eslint-plugin-vitest: "^0.2.8"
  • eslint-plugin-vue: "^9.16.1"
  • eslint-plugin-vuetify: "^2.0.5"

The following code snippet demonstrates the problem :

<script lang="ts" setup>
  const props = defineProps<{ fruit: string }>()
  const fruitColor = ref<FruitColor>(getColor(props.fruit))
</script>

This is my .eslintrc.js configuration file, which may provide some insight:

module.exports = {
  root: true,
  env: {
    browser: true,
    node: true
  },
  extends: ['@nuxtjs/eslint-config-typescript', 'plugin:nuxt/recommended', 'plugin:vitest/recommended', 'prettier'],
  rules: {
    'vue/script-indent': ['error', 2, { baseIndent: 1 }],
    'vue/max-len': ['error', { code: 120 }],
    'vue/component-name-in-template-casing': [
      'error',
      'kebab-case',
      {
        registeredComponentsOnly: true,
        ignores: []
      }
    ],
    'comma-dangle': ['error', 'never'],
  }
}

Answer №1

Consider utilizing a computed property instead of a ref. Computed properties have the ability to automatically monitor their reactive dependencies, so any modifications in props.fruit will promptly trigger reactivity.

Modification in Code:

<script lang="ts" setup>
  const props = defineProps<{ fruit: string }>()
  const fruitColor = computed<FruitColor>(() => getColor(props.fruit));  
</script>

Answer №2

After discovering the solution, I completely forgot to return and provide an answer. The relevant information can be found in the documentation: https://vuejs.org/api/reactivity-utilities Utilize either toRef(props.fruit) or const {fruit} = toRefs(props) for comprehensive transformation.

// Yielding read and write access while keeping the original props.fruit intact
toRef(props.fruit)

// Generating a readonly ref that triggers the getter upon accessing .value
toRef(() => props.foo)

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