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feat: type-safe object syntax for useRobotsRule (#214)
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‎.playground/pages/ai-test.vue

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<script setup>
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const robotRule = useRobotsRule()
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function blockAI() {
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robotRule.value = { noai: true }
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}
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function blockImageAI() {
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robotRule.value = { noimageai: true }
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}
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function blockBoth() {
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robotRule.value = { noai: true, noimageai: true }
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}
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function setLargePreview() {
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robotRule.value = { 'max-image-preview': 'large' }
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}
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function setStandardPreview() {
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robotRule.value = { 'max-image-preview': 'standard' }
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}
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function setNoPreview() {
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robotRule.value = { 'max-image-preview': 'none' }
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}
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function setLimitedSnippet() {
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robotRule.value = { 'max-snippet': 120 }
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}
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function setUnlimitedSnippet() {
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robotRule.value = { 'max-snippet': -1 }
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}
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function setCustomCombination() {
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// Combine multiple directives
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robotRule.value = {
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'index': true,
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'follow': true,
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'noai': true,
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'max-image-preview': 'standard',
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'max-snippet': 150,
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'max-video-preview': 30,
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}
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}
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function allowAll() {
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robotRule.value = true
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}
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// Set initial rule with preview settings
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robotRule.value = {
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'max-image-preview': 'large',
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'max-snippet': -1,
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}
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</script>
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<template>
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<div>
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<h1>Robot Directives Test Page</h1>
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<p>This page demonstrates various robot directives including non-standard ones.</p>
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<div>
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<h2>Current robot rule: {{ robotRule }}</h2>
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<h3>AI Directives (Non-standard)</h3>
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<button @click="blockAI">
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Block AI Crawlers
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</button>
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<button @click="blockImageAI">
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Block AI Image Crawlers
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</button>
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<button @click="blockBoth">
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Block AI (Both)
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</button>
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<h3>Preview Directives</h3>
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<button @click="setLargePreview">
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Large Image Preview
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</button>
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<button @click="setStandardPreview">
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Standard Image Preview
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</button>
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<button @click="setNoPreview">
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No Image Preview
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</button>
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<button @click="setLimitedSnippet">
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Limited Text Snippet (120 chars)
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</button>
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<button @click="setUnlimitedSnippet">
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Unlimited Snippet
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</button>
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<h3>Combined Examples</h3>
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<button @click="setCustomCombination">
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Custom Combination
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</button>
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<button @click="allowAll">
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Allow All (Default)
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</button>
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</div>
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</div>
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</template>

‎docs/content/2.guides/1.disable-page-indexing.md

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@@ -36,8 +36,19 @@ The [useRobotsRule](/docs/robots/api/use-robots-rule) composable provides a reac
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```ts
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import { useRobotsRule } from '#imports'
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// Using string syntax
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const rule = useRobotsRule()
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rule.value = 'noindex, nofollow'
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// Using object syntax (recommended)
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useRobotsRule({ noindex: true, nofollow: true })
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// Combining with AI-specific directives
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useRobotsRule({
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noindex: true,
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noai: true, // Prevent AI crawlers from using content
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noimageai: true // Prevent AI crawlers from using images
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})
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```
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## Route Rules

‎docs/content/2.guides/2.route-rules.md

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@@ -9,6 +9,7 @@ You can provide the following rules:
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- `{ robots: false }`{lang="json"} - Will disable the route from being indexed using the [robotsDisabledValue](/docs/robots/api/config#robotsdisabledvalue) config.
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- `{ robots: '<rule>' }`{lang="json"} - Will add the provided string as the robots rule
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- `{ robots: { /* directives */ } }`{lang="json"} - Will use object syntax to define robot directives
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The rules are applied using the following logic:
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- `X-Robots-Tag` header - SSR only,
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'/secret/visible': { robots: true },
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// use the `robots` rule if you need finer control
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'/custom-robots': { robots: 'index, follow' },
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// use object syntax for more complex rules
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'/ai-protected': {
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robots: {
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index: true,
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noai: true,
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noimageai: true
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}
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},
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// control search result previews
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'/limited-preview': {
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robots: {
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index: true,
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'max-image-preview': 'standard',
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'max-snippet': 100,
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'max-video-preview': 15
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}
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}
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}
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})
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```

‎docs/content/3.api/0.use-robots-rule.md

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## Introduction
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**Type:** `function useRobotsRule(rule?: MaybeRef<boolean | string>): Ref<string>`{lang="ts"}
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**Type:** `function useRobotsRule(rule?: MaybeRef<boolean | string | Partial<RobotDirectives>>): Ref<string>`{lang="ts"}
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View and control the robots rule using a simple reactivity API.
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View and control the robots rule using a simple reactivity API. Supports standard directives (index, noindex, follow, nofollow) and non-standard directives like noai and noimageai.
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It's recommended to use this composable when you need to dynamically change the robots rule at runtime. For example when a user changes their profile from private to public.
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const rule = useRobotsRule(true) // does not do anything, just returns the value
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```
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## Available Directives
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When using the object syntax, you can use the following directives:
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### Standard Directives
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- `index`: Allow search engines to index the page
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- `noindex`: Prevent search engines from indexing the page
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- `follow`: Allow search engines to follow links on the page
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- `nofollow`: Prevent search engines from following links on the page
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- `none`: Equivalent to `noindex, nofollow`
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- `all`: Equivalent to `index, follow`
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### Non-Standard Directives
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- `noai`: Request AI crawlers not to use content for training
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- `noimageai`: Request AI crawlers not to use images for training
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### Preview Control Directives
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- `max-image-preview`: Controls image preview size (`'none'`, `'standard'`, or `'large'`)
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- `max-snippet`: Controls text snippet length in characters (use `-1` for no limit)
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- `max-video-preview`: Controls video preview length in seconds (use `-1` for no limit)
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## Usage
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**Accessing the rule:**
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rule.value = 'index, nofollow'
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// Ref<'index, nofollow'>
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```
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**Setting the rule - object syntax:**
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```ts
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import { useRobotsRule } from '#imports'
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// Using object syntax for directives
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useRobotsRule({ noindex: true, nofollow: true })
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// Ref<'noindex, nofollow'>
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// Combining standard and non-standard directives
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useRobotsRule({ index: true, noai: true, noimageai: true })
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// Ref<'index, noai, noimageai'>
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// Only true values are included
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useRobotsRule({ index: true, follow: false, noai: true })
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// Ref<'index, noai'>
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// Empty object defaults to enabled value
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useRobotsRule({})
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// Ref<'index, follow, max-image-preview:large, max-snippet:-1, max-video-preview:-1'>
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```
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**Setting the rule - with max-* directives:**
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```ts
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import { useRobotsRule } from '#imports'
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// Control search result preview settings
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useRobotsRule({
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index: true,
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'max-image-preview': 'large', // 'none', 'standard', or 'large'
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'max-snippet': 150, // number of characters
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'max-video-preview': 30 // seconds of video preview
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})
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// Ref<'index, max-image-preview:large, max-snippet:150, max-video-preview:30'>
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// Disable all previews
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useRobotsRule({
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index: true,
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'max-image-preview': 'none',
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'max-snippet': 0,
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'max-video-preview': 0
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})
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// Ref<'index, max-image-preview:none, max-snippet:0, max-video-preview:0'>
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```

‎src/module.ts

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@@ -22,6 +22,7 @@ import { setupDevToolsUI } from './devtools'
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import { resolveI18nConfig, splitPathForI18nLocales } from './i18n'
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import { isNuxtGenerate, resolveNitroPreset } from './kit'
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import { logger } from './logger'
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import { formatMaxImagePreview, formatMaxSnippet, formatMaxVideoPreview, ROBOT_DIRECTIVE_VALUES } from './runtime/const'
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import {
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normaliseRobotsRouteRule,
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} from './runtime/server/nitro'
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header: true,
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metaTag: true,
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cacheControl: 'max-age=14400, must-revalidate',
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robotsEnabledValue: 'index, follow, max-image-preview:large, max-snippet:-1, max-video-preview:-1',
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robotsDisabledValue: 'noindex, nofollow',
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robotsEnabledValue: ROBOT_DIRECTIVE_VALUES.enabled,
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robotsDisabledValue: ROBOT_DIRECTIVE_VALUES.disabled,
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disallowNonIndexableRoutes: false,
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robotsTxt: true,
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botDetection: true,
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nuxt.hooks.hook('content:file:afterParse', (ctx) => {
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if (typeof ctx.content.robots !== 'undefined') {
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let rule = ctx.content.robots
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if (typeof rule === 'boolean' || !rule) {
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if (typeof rule === 'boolean') {
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rule = rule ? config.robotsEnabledValue : config.robotsDisabledValue
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}
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else if (typeof rule === 'object' && rule !== null) {
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const directives: string[] = []
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for (const [key, value] of Object.entries(rule)) {
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if (value === false || value === null || value === undefined)
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continue
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// Handle boolean directives
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if (key in ROBOT_DIRECTIVE_VALUES && typeof value === 'boolean' && value) {
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directives.push(ROBOT_DIRECTIVE_VALUES[key as keyof typeof ROBOT_DIRECTIVE_VALUES])
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}
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// Handle max-image-preview
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else if (key === 'max-image-preview' && typeof value === 'string') {
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directives.push(formatMaxImagePreview(value as 'none' | 'standard' | 'large'))
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}
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// Handle max-snippet
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else if (key === 'max-snippet' && typeof value === 'number') {
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directives.push(formatMaxSnippet(value))
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}
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// Handle max-video-preview
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else if (key === 'max-video-preview' && typeof value === 'number') {
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directives.push(formatMaxVideoPreview(value))
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}
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}
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rule = directives.join(', ') || config.robotsEnabledValue
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}
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// add route rule for the path
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ctx.content.seo = ctx.content.seo || {}
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// @ts-expect-error runtime type
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_robotsPatternMap?: Map<string, import('${typesPath}').PatternMapValue>
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}
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interface NitroRouteRules {
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robots?: boolean | string | {
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robots?: import('${typesPath}').RobotsValue | {
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indexable: boolean
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rule: string
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}
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}
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interface NitroRouteConfig {
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robots?: boolean | string | {
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robots?: import('${typesPath}').RobotsValue | {
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indexable: boolean
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rule: string
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}

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