Combine layouts to get the best of both worlds

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Now that you have added a layout to each blog post, it’s time to make your posts look like the rest of the pages on your website!

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Nest your blog post layout inside your main page layout

Nest your two layouts

You already have a BaseLayout.astro for defining the overall layout of your pages.

MarkdownPostLayout.astro gives you some additional templating for common blog post properties such as title and date, but your blog posts don’t look like the other pages on your site. You can match the look of your blog posts to the rest of your site by nesting layouts.

In src/layouts/MarkdownPostLayout.astro, import BaseLayout.astro and use it to wrap the entire template content. Don’t forget to pass the pageTitle prop:

---
import BaseLayout from './BaseLayout.astro';
const { frontmatter } = Astro.props;
---
<BaseLayout pageTitle={frontmatter.title}>
  <h1>{frontmatter.title}</h1>
  <p>{frontmatter.pubDate.toString().slice(0,10)}</p>
  <p><em>{frontmatter.description}</em></p>
  <p>Written by: {frontmatter.author}</p>
  <img src={frontmatter.image.url} width="300" alt={frontmatter.image.alt} />
  <slot />
</BaseLayout>

Check your browser preview at http://localhost:4321/posts/post-1. Now you should see content rendered by:
- Your main page layout, including your styles, navigation links, and social footer.
- Your blog post layout, including frontmatter properties like the description, date, title, and image.
- Your individual blog post Markdown content, including just the text written in this post.

Notice that your page title is now displayed twice, once by each layout.

Remove the line that displays your page title from MarkdownPostLayout.astro:

<BaseLayout pageTitle={frontmatter.title}>
  <h1>{frontmatter.title}</h1>
  <p>{frontmatter.pubDate.toString().slice(0,10)}</p>
  <p><em>{frontmatter.description}</em></p>
  <p>Written by: {frontmatter.author}</p>
  <img src={frontmatter.image.url} width="300" alt={frontmatter.image.alt} />
  <slot />
</BaseLayout>

Check your browser preview again at http://localhost:4321/posts/post-1 and verify that this line is no longer displayed and that your title is only displayed once. Make any other adjustments necessary to ensure that you do not have any duplicated content.

Make sure that:

Each blog post shows the same page template, and no content is missing. (If one of your blog posts is missing content, check its frontmatter properties.)
No content is duplicated on a page. (If something is being rendered twice, then be sure to remove it from MarkdownPostLayout.astro.)

If you’d like to customize your page template, you can.

Test your knowledge

This allows you to nest one layout inside another and take advantage of working with modular pieces.
1. continuous deployment
2. responsive design
3. component-based design
Multiple layouts are particularly useful for projects that contain Markdown pages, like a…
1. blog
2. dashboard
3. chat app
Which of these provides templating for all your pages?
1. index.astro
2. BaseLayout.astro
3. post-1.md