component-name-in-template-casing.md

Pattern: Inconsistent casing for component name in template

Issue: -

Description

This rule aims to warn the tag names other than the configured casing in Vue.js template.

Options

{
  "vue/component-name-in-template-casing": ["error", "PascalCase" | "kebab-case", {
    "registeredComponentsOnly": true,
    "ignores": []
  }]
}

• "PascalCase" (default) ... enforce tag names to pascal case. E.g. <CoolComponent>. This is consistent with the JSX practice.
• "kebab-case" ... enforce tag names to kebab case: E.g. <cool-component>. This is consistent with the HTML practice which is case-insensitive originally.
• registeredComponentsOnly ... If true, only registered components (in PascalCase) are checked. If false, check all. default true
• ignores (string[]) ... The element names to ignore. Sets the element name to allow. For example, custom elements or Vue components with special name. You can set the regexp by writing it like "/^name/".

"PascalCase", { registeredComponentsOnly: true } (default)

<template>
  <!-- ✓ GOOD -->
  <CoolComponent />
  
  <!-- ✗ BAD -->
  <cool-component />
  <coolComponent />
  <Cool-component />

  <!-- ignore -->
  <UnregisteredComponent />
  <unregistered-component />

  <registered-in-kebab-case />
  <registeredInCamelCase />
</template>
<script>
export default {
  components: {
    CoolComponent,
    'registered-in-kebab-case': VueComponent1,
    'registeredInCamelCase': VueComponent2
  }
}
</script>

"kebab-case"

<template>
  <!-- ✓ GOOD -->
  <cool-component />

  <!-- ✗ BAD -->
  <CoolComponent />
  <coolComponent />
  <Cool-component />

  <!-- ignore -->
  <unregistered-component />
  <UnregisteredComponent />
</template>
<script>
export default {
  components: {
    CoolComponent
  }
}
</script>

"PascalCase", { registeredComponentsOnly: false }

<template>
  <!-- ✓ GOOD -->
  <CoolComponent />
  <UnregisteredComponent />
  
  <!-- ✗ BAD -->
  <cool-component />
  <unregistered-component />
</template>
<script>
export default {
  components: {
    CoolComponent
  }
}
</script>

"PascalCase", { ignores: ["/^custom-/"], registeredComponentsOnly: false }

<template>
  <!-- ✓ GOOD -->
  <CoolComponent/>
  <custom-element></custom-element>
  <custom-button></custom-button>
  <custom-input />
  
  <!-- ✗ BAD -->
  <magic-element></magic-element>
</template>

Further Reading

• eslint-plugin-vue - component-name-in-template-casing