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useVueValidVIf

src/content/docs/linter/rules/use-vue-valid-v-if.mdx

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import { Tabs, TabItem } from '@astrojs/starlight/components';

<Tabs> <TabItem label="HTML" icon="seti:html"> :::caution This rule is part of the [nursery](/linter/#nursery) group. This means that it is experimental and the behavior can change at any time. ::: ## Summary - Rule available since: `v2.3.6` - Diagnostic Category: [`lint/nursery/useVueValidVIf`](/reference/diagnostics#diagnostic-category) - This rule doesn't have a fix. - The default severity of this rule is [**information**](/reference/diagnostics#information). - This rule belongs to the following domains: - [`vue`](/linter/domains#vue) - Sources: - Same as [`vue/valid-v-if`](https://eslint.vuejs.org/rules/valid-v-if)

How to configure

json
{
	"linter": {
		"rules": {
			"nursery": {
				"useVueValidVIf": "error"
			}
		}
	}
}

Description

Enforces valid v-if usage for Vue templates.

This rule reports v-if directives in following cases:

  • The directive has an argument. E.g. <div v-if:aaa="foo"></div>
  • The directive has a modifier. E.g. <div v-if.bbb="foo"></div>
  • The directive does not have an attribute value. E.g. <div v-if></div>
  • The same element also has v-else or v-else-if. E.g. <div v-if="foo" v-else></div>

Examples

Invalid

vue
<div v-if:aaa="foo"></div>
<pre class="language-text"><code class="language-text"></code></pre>
vue
<div v-if.bbb="foo"></div>
<pre class="language-text"><code class="language-text"></code></pre>
vue
<div v-if></div>
<pre class="language-text"><code class="language-text"></code></pre>
vue
<div v-if="foo" v-else></div>
<pre class="language-text"><code class="language-text"></code></pre>
vue
<div v-if="foo" v-else-if="bar"></div>
<pre class="language-text"><code class="language-text"></code></pre>

Valid

vue
<div v-if="ok"></div>
vue
<div v-if="a < b"></div>
vue
<div v-if="a"></div>
<div v-else-if="b"></div>
<div v-else></div>
</TabItem> </Tabs>