vue/return-in-computed-property 
enforce that a return statement is present in computed property
- ⚙️ This rule is included in all of 
"plugin:vue/vue3-essential",*.configs["flat/essential"],"plugin:vue/essential",*.configs["flat/vue2-essential"],"plugin:vue/vue3-strongly-recommended",*.configs["flat/strongly-recommended"],"plugin:vue/strongly-recommended",*.configs["flat/vue2-strongly-recommended"],"plugin:vue/vue3-recommended",*.configs["flat/recommended"],"plugin:vue/recommended"and*.configs["flat/vue2-recommended"]. 
📖 Rule Details 
This rule enforces that a return statement is present in computed properties and functions.
🔧 Options 
json
{
  "vue/return-in-computed-property": ["error", {
    "treatUndefinedAsUnspecified": true
  }]
}This rule has an object option:
"treatUndefinedAsUnspecified":true(default) disallows implicitly returning undefined with areturnstatement.
treatUndefinedAsUnspecified: false 
🚀 Version 
This rule was introduced in eslint-plugin-vue v3.7.0