v-on-event-hyphenation.md

pageClass	sidebarDepth	title	description	since
rule-details	0	vue/v-on-event-hyphenation	enforce v-on event naming style on custom components in template	v7.4.0

vue/v-on-event-hyphenation

enforce v-on event naming style on custom components in template

• ⚙️ This rule is included in "plugin:vue/vue3-strongly-recommended" and "plugin:vue/vue3-recommended".
• 🔧 The --fix option on the command line can automatically fix some of the problems reported by this rule.

📖 Rule Details

This rule enforces using hyphenated v-on event names on custom components in Vue templates.

<template>
  <!-- ✓ GOOD -->
  <MyComponent v-on:custom-event="handleEvent"/>
  <MyComponent @custom-event="handleEvent"/>

  <!-- ✗ BAD -->
  <MyComponent v-on:customEvent="handleEvent"/>
  <MyComponent @customEvent="handleEvent"/>
</template>

🔧 Options

{
  "vue/v-on-event-hyphenation": ["error", "always" | "never", {
    "autofix": false,
    "ignore": []
  }]
}

• "always" (default) ... Use hyphenated name.
• "never" ... Don't use hyphenated name.
• "ignore" ... Array of ignored names
• "autofix" ... If true, enable autofix. If you are using Vue 2, we recommend that you do not use it due to its side effects.

"always"

It errors on upper case letters.

<template>
  <!-- ✓ GOOD -->
  <MyComponent v-on:custom-event="handleEvent"/>

  <!-- ✗ BAD -->
  <MyComponent v-on:customEvent="handleEvent"/>
</template>

"never"

It errors on hyphens.

<template>
  <!-- ✓ GOOD -->
  <MyComponent v-on:customEvent="handleEvent"/>

  <!-- ✗ BAD -->
  <MyComponent v-on:custom-event="handleEvent"/>
</template>

"never", { "ignore": ["custom-event"] }

Don't use hyphenated name but allow custom event names

<template>
  <!-- ✓ GOOD -->
  <MyComponent v-on:custom-event="handleEvent"/>
  <MyComponent v-on:myEvent="handleEvent"/>

  <!-- ✗ BAD -->
  <MyComponent v-on:my-event="handleEvent"/>
</template>

👫 Related Rules

• vue/custom-event-name-casing
• vue/attribute-hyphenation

📚 Further Reading

• Guide - Custom Events

🚀 Version

This rule was introduced in eslint-plugin-vue v7.4.0

🔍 Implementation

• Rule source
• Test source