how to use javascript to optionally include content in mdx files?
#how to optionally include content in mdx file
wooden copper
fathom frostBOT
Hi @wooden copper. I'm kapa.ai, your friendly support bot. I will try to answer your question by searching through the knowledge base. :wave:
Astro's MDX integration allows you to include JavaScript expressions and custom components within your Markdown content. This means you can use JavaScript to conditionally render content in your .mdx files.
Here's a basic example of how you might do this:
export const shouldShowContent = true;
{shouldShowContent && (
<p>This is some optional content.</p>
)}
In this example, the paragraph will only be rendered if shouldShowContent is true.
You can write and edit .mdx files directly in your code editor, alongside your project files. For more information on using MDX with Astro, you can refer to the Astro MDX integration guide (https://docs.astro.build/en/guides/integrations-guide/mdx/).
Remember that .mdx files must be written in MDX syntax (https://mdxjs.com/docs/what-is-mdx/#mdx-syntax) rather than Astro’s HTML-like syntax. MDX syntax allows you to write JSX directly in your markdown files, which is how we're able to use the JavaScript expression above to conditionally render content.
Source (https://docs.astro.build/en/guides/content/#mdx-authoring)
Note: you can ask me a follow up question by @ mentioning me again :speech_balloon:
wooden copper
@fathom frost I get error Could not parse expression with acorn
fathom frostBOT
Let me check the knowledge base for you. One moment! :books:
The error message "Could not parse expression with acorn" typically indicates a syntax error in your JavaScript code. Acorn is a JavaScript parser used by Astro and many other tools to understand your code. If Acorn encounters code it doesn't understand, it throws an error.
Unfortunately, the provided knowledge sources do not contain specific information about this error in the context of Astro. However, here are some general steps you can take to troubleshoot:
-
Check your code for syntax errors: Ensure that all your JavaScript expressions are correctly formed. This includes checking for missing or misplaced brackets, parentheses, commas, etc.
-
Validate your JavaScript: You can use online tools like JSHint (https://jshint.com/) or ESLint (https://eslint.org/) to check your code for common issues. For Astro support, a community maintained ESLint plugin can be installed. More information can be found in the Astro documentation (https://docs.astro.build/en/editor-setup/#eslint).
-
Isolate the problem: If your project is large, try commenting out sections of your code to identify the specific line or block causing the error.
-
Ask for help: If you're still stuck, consider asking for help in the Astro Discord community (https://astro.build/chat). Be sure to provide a minimal reproduction of your issue, as suggested in the Astro troubleshooting guide (https://docs.astro.build/en/guides/troubleshooting/#creating-minimal-reproductions).
Remember, the more specific you can be about your issue, the easier it will be for others to help you solve it.
Note: you can ask me a follow up question by @ mentioning me again :speech_balloon:
wooden copper
@fathom frost how to include h2 in table of contents?
fathom frostBOT
Let me check the knowledge base for you. One moment! :books:
In Astro, you can include <h2> headings in the table of contents by configuring the tableOfContents option in your Astro configuration or in the frontmatter of individual pages.
By default, <h2> and <h3> headings are included in the table of contents. This is configured with the minHeadingLevel and maxHeadingLevel options, which default to 2 and 3 respectively.
Here's how you can set it up:
Globally in Astro Configuration
In your astro.config.mjs file, you can define the tableOfContents option within the starlight integration:
defineConfig({
integrations: [
starlight({
title: 'Docs with custom table of contents config',
tableOfContents: { minHeadingLevel: 2, maxHeadingLevel: 2 },
}),
],
});
Individually in Frontmatter
In the frontmatter of your .md files, you can override the global configuration:
---
title: Page with only H2s in the table of content
tableOfContents:
minHeadingLevel: 2
maxHeadingLevel: 2
---
In both examples, only <h2> headings will be included in the table of contents.
For more information, refer to the Astro documentation on configuring the table of contents (https://starlight.astro.build/reference/configuration/#tableofcontents) and customizing the table of contents (https://starlight.astro.build/guides/customization/#table-of-contents).
Note: you can ask me a follow up question by @ mentioning me again :speech_balloon:
wooden copper
@fathom frost make manual h2 heading tags appear in table of contents
fathom frostBOT
Let me check the knowledge base for you. One moment! :books:
To make manual <h2> heading tags appear in the table of contents in Astro, you need to ensure that the minHeadingLevel and maxHeadingLevel options in your tableOfContents configuration include the number 2, which corresponds to <h2> headings.
By default, <h2> and <h3> headings are included in the table of contents. This is configured with the minHeadingLevel and maxHeadingLevel options, which default to 2 and 3 respectively.
Here's how you can set it up:
Globally in Astro Configuration
In your astro.config.mjs file, you can define the tableOfContents option within the starlight integration:
defineConfig({{
integrations: [
starlight({{
title: 'Docs with custom table of contents config',
tableOfContents: {{ minHeadingLevel: 2, maxHeadingLevel: 2 }},
}}),
],
}});
Individually in Frontmatter
In the frontmatter of your .md files, you can override the global configuration:
---
title: Page with only H2s in the table of content
tableOfContents:
minHeadingLevel: 2
maxHeadingLevel: 2
---
In both examples, only <h2> headings will be included in the table of contents.