Expressive Code Features Showcase

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import { z } from 'zod';
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const UserSchema = z.object({
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  id: z.number(),
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  name: z.string().min(1),
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  email: z.string().email(),
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  age: z.number().min(0).max(120),
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});
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export type User = z.infer<typeof UserSchema>;
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export class UserService {
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  private users: User[] = [];
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  async createUser(userData: Omit<User, 'id'>): Promise<User> {
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    const user = {
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      id: Date.now(),
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      ...userData,
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    };
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    // Validate the user data
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    const validUser = UserSchema.parse(user);
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    this.users.push(validUser);
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    return validUser;
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  }
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  async getUserById(id: number): Promise<User | null> {
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    return this.users.find(user => user.id === id) || null;
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  }
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}

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---
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interface Props {
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  title: string;
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  content: string;
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  author: {
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    name: string;
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    avatar: string;
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  };
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}
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const { title, content, author } = Astro.props;
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---
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<article>
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  <header>
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    <h1>{title}</h1>
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    <div class="author">
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      <img src={author.avatar} alt={author.name} />
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      <span>{author.name}</span>
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    </div>
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  </header>
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  <div class="content" set:html={content} />
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</article>

{
  "name": "my-astro-blog",
  "version": "2.0.0",
  "version": "1.0.0",
  "type": "module",
  "dependencies": {
    "astro": "^5.11.0",
    "astro-expressive-code": "^0.38.3",
    "typescript": "^5.0.0",
    "@types/node": "^20.0.0"
  }
}

export const debounce = (func, wait) => {
  let timeout;
  return function executedFunction(...args) {
    const later = () => {
      clearTimeout(timeout);
      func(...args);
    };
    clearTimeout(timeout);
    timeout = setTimeout(later, wait);
  };
};

:root {
  --primary-color: #2337ff;
  --secondary-color: #000d8a;
  --text-color: #34293d;
  --background-color: #ffffff;
}

.button {
  background: var(--primary-color);
  color: white;
  border: none;
  border-radius: 8px;
  padding: 0.75rem 1.5rem;
  cursor: pointer;
  transition: background 0.2s ease;
}

.button:hover {
  background: var(--secondary-color);
}

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import { getCollection, type CollectionEntry } from 'astro:content';
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import { z } from 'zod';
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// Schema for blog post frontmatter validation
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const BlogPostSchema = z.object({
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  title: z.string().min(1),
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  description: z.string().min(1),
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  pubDate: z.date(),
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  updatedDate: z.date().optional(),
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  tags: z.array(z.string()),
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  draft: z.boolean().default(false),
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});
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// Type-safe blog post utilities
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export class BlogUtils {
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  static async getAllPosts(): Promise<CollectionEntry<'blog'>[]> {
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    const posts = await getCollection('blog', ({ data }) => {
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      return data.draft !== true;
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    });
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    // Sort by publication date (newest first)
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    return posts.sort((a, b) =>
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      b.data.pubDate.valueOf() - a.data.pubDate.valueOf()
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    );
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  }
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  static async getPostsByTag(tag: string): Promise<CollectionEntry<'blog'>[]> {
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    const allPosts = await this.getAllPosts();
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    return allPosts.filter(post =>
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      post.data.tags.includes(tag)
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    );
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  }
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  static async getFeaturedPosts(limit = 3): Promise<CollectionEntry<'blog'>[]> {
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    const allPosts = await this.getAllPosts();
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    return allPosts.slice(0, limit);
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  }
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  static validatePostData(data: unknown): BlogPostData {
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    return BlogPostSchema.parse(data);
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  }
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  static generateSlug(title: string): string {
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    return title
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      .toLowerCase()
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      .replace(/[^a-z0-9]+/g, '-')
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      .replace(/^-|-$/g, '');
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  }
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}
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export type BlogPostData = z.infer<typeof BlogPostSchema>;