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Starlight Tags

Extended Schema Demo

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This page demonstrates how to extend the base tag schema with multiple custom field sets. You can combine educational fields (difficulty, prerequisites) with product fields (planTier) in a single schema.

Product Filtering (Plan Tiers)

Section titled “Product Filtering (Plan Tiers)”

Filter tags by pricing tier. Perfect for SaaS documentation:

Showing 10 of 10 tags

Plan Tier Badges

Section titled “Plan Tier Badges”

Educational Filtering (Difficulty Levels)

Section titled “Educational Filtering (Difficulty Levels)”

Filter tags by difficulty level. Great for learning paths and tutorials:

Showing 6 of 6 tags

Difficulty Badges

Section titled “Difficulty Badges”

With Prerequisites

Section titled “With Prerequisites”
Async JS Advanced
Requires:
  • js-functions

Combined Schema

Section titled “Combined Schema”

Both field sets can coexist in a single schema:

src/config/extended-tag-schema.ts
import { z } from 'astro/zod';
import { tagDefinitionSchema } from 'starlight-tags/schemas/tags';


export const extendedTagSchema = tagDefinitionSchema.extend({
  // Educational fields
  difficulty: z.enum(['beginner', 'intermediate', 'advanced']).optional(),
  contentType: z.enum(['lecture', 'lab', 'tutorial', 'reference']).optional(),
  prerequisites: z.array(z.string()).optional(),


  // Product fields
  product: z.string().optional(),
  planTier: z.enum(['free', 'pro', 'enterprise']).optional(),
});

Example tags.yml

Section titled “Example tags.yml”

Tags can have educational fields, product fields, or both:

tags:
  # Educational only
  js-basics:
    label: "JS Basics"
    difficulty: beginner
    contentType: lecture


  # Product only
  components:
    label: "Components"
    planTier: free


  # Both fields!
  advanced-api:
    label: "Advanced API"
    difficulty: advanced
    planTier: enterprise
    prerequisites: ["js-basics"]

Implementation Details

Section titled “Implementation Details”

Educational Component

Section titled “Educational Component”
DifficultyTagBadge.astro
---
import type { ProcessedTag } from 'starlight-tags/schemas/tags';
import type { ExtendedTag } from '../config/extended-tag-schema';


const { tagId } = Astro.props;


const { tags } = Astro.locals.starlightTags;
const tag = tags.get(tagId) as (ProcessedTag & ExtendedTag) | undefined;


const difficultyColors = {
  beginner: '#22c55e',
  intermediate: '#f59e0b',
  advanced: '#ef4444'
};
---


{tag && (
  <span class="tag">
    {tag.label}
    {tag.difficulty && (
      <span style={`background: ${difficultyColors[tag.difficulty]}`}>
        {tag.difficulty}
      </span>
    )}
  </span>
)}

Product Component

Section titled “Product Component”
ProductTagBadge.astro
---
import type { ProcessedTag } from 'starlight-tags/schemas/tags';
import type { ExtendedTag } from '../config/extended-tag-schema';


const { tagId } = Astro.props;


const { tags } = Astro.locals.starlightTags;
const tag = tags.get(tagId) as (ProcessedTag & ExtendedTag) | undefined;


const tierColors = {
  free: '#22c55e',
  pro: '#3b82f6',
  enterprise: '#8b5cf6'
};
---


<span class="tag">
  {tag.label}
  {tag.planTier && (
    <span style={`background: ${tierColors[tag.planTier]}`}>
      {tag.planTier}
    </span>
  )}
</span>

Filtering by Custom Fields

Section titled “Filtering by Custom Fields”
// Filter by difficulty
const beginnerTags = allTags.filter(tag => tag.difficulty === 'beginner');


// Filter by plan tier
const freeTags = allTags.filter(tag => tag.planTier === 'free');


// Filter by both (e.g., beginner + free)
const accessibleTags = allTags.filter(
  tag => tag.difficulty === 'beginner' && tag.planTier === 'free'
);