no-ref-as-operand.md

pageClass	sidebarDepth	title	description	since
rule-details	0	vue/no-ref-as-operand	disallow use of value wrapped by `ref()` (Composition API) as an operand	v7.0.0

vue/no-ref-as-operand

disallow use of value wrapped by ref() (Composition API) as an operand

• ⚙️ This rule is included in all of "plugin:vue/vue3-essential", "plugin:vue/vue3-strongly-recommended" and "plugin:vue/vue3-recommended".

📖 Rule Details

This rule reports cases where a ref is used incorrectly as an operand.
You must use .value to access the Ref value.

<script>
import { ref } from 'vue'

export default {
  setup () {
    const count = ref(0)
    const ok = ref(true)

    /* ✓ GOOD */
    count.value++
    count.value + 1
    1 + count.value
    var msg = ok.value ? 'yes' : 'no'

    /* ✗ BAD */
    count++
    count + 1
    1 + count
    var msg = ok ? 'yes' : 'no'

    return {
      count
    }
  }
}
</script>

🔧 Options

Nothing.

📚 Further Reading

• Guide - Reactivity - Reactivity Fundamentals / Creating Standalone Reactive Values as refs
• Vue RFCs - 0013-composition-api

🚀 Version

This rule was introduced in eslint-plugin-vue v7.0.0

🔍 Implementation

• Rule source
• Test source