Isamu Takeda

This block has the function of editing Markdown documents using SimpleMDE, and by parsing Markdown documents using marked, it can assign specific blocks to the converted HTML elements. 
This function allows users to customize Markdown documents using the styling functions of the corresponding blocks, allowing for a wide range of styling. 
The following are the blocks that are applied when Markdown documents are parsed into HTML elements.
<ol>
<li>H element: itmar/design-title</li>
<li>P element: core/paragraph</li>
<li>PRE element: itmar/code-highlight</li>
<li>IMG element: core/image</li>
<li>BLOCKQUOTE element: core/quote</li>
<li>LI element: core/list</li>
<li>TABLE element: core/table</li>
</ol>
The H element is also generated as a table of contents, and has the function of displaying nested items according to level. 
This plugin does not require any external resources (all scripts and styles are included locally)
<h3>Related Links</h3>
<ul>
<li><a href="https://github.com/itmaroon/markdown-block" rel="nofollow ugc">markdown-block:Github</a></li>
<li><a href="https://github.com/itmaroon/block-class-package" rel="nofollow ugc">block-class-package:GitHub</a> </li>
<li><a href="https://packagist.org/packages/itmar/block-class-package" rel="nofollow ugc">block-class-package:Packagist</a> </li>
<li><a href="https://www.npmjs.com/package/itmar-block-packages" rel="nofollow ugc">itmar-block-packages:npm</a> </li>
<li><a href="https://github.com/itmaroon/itmar-block-packages" rel="nofollow ugc">itmar-block-packages:GitHub</a></li>
</ul>
<h3>Arbitrary section</h3>
<ol>
<li>
PHP class management is now done using Composer. 
<a href="https://github.com/itmaroon/block-class-package" rel="nofollow ugc">GitHub</a> 
<a href="https://packagist.org/packages/itmar/block-class-package" rel="nofollow ugc">Packagist</a>
</li>
<li>
I decided to make functions and components common to other plugins into npm packages, and install and use them from npm. 
<a href="https://www.npmjs.com/package/itmar-block-packages" rel="nofollow ugc">npm</a> 
<a href="https://github.com/itmaroon/itmar-block-packages" rel="nofollow ugc">GitHub</a>
</li>
</ol>
<h3>External services</h3>
<ol>
<li>This plugin uses EasyMDE to implement the editing function of Markdown documents. This is an open source JavaScript library provided under the MIT license. 
<a href="https://github.com/Ionaru/easy-markdown-editor/blob/master/LICENSE" rel="nofollow ugc">EasyMDE LICENSE</a> 
EasyMDE comes with a spell check feature. 
When using this feature, it will try to load an external file (en_US.aff / en_US.dic) from a CDN. To avoid this, this plugin sets spellChecker: false, when instantiating EasyMDE, so that the external file will not be loaded.</li>
<li>This plugin uses marked to parse Markdown documents and convert them to HTML elements. This is an open source JavaScript library provided under the MIT license. 
<a href="https://github.com/markedjs/marked/blob/master/LICENSE.md" rel="nofollow ugc">marked LICENSE</a></li>
</ol>

MarkDown Block

This block converts Markdown documents into blocks for styling web pages.

mitchmac

The plugin creates zip files containing posts converted to Markdown. A WP-CLI command exists to handle exporting sites with a large amount of content.
<ul>
<li>Move WordPress content to Gatsby-friendly Markdown.</li>
<li>Customize the export! Remap and restructure exported fields.</li>
<li>CLI: Avoid PHP timeouts by using the command line with WP-CLI.</li>
<li>CLI: Export progress bar (great for large sites)!</li>
</ul>
<blockquote>
Reminder: always keep a backup of the WordPress database and files in case your export doesn’t work as expected!
</blockquote>
<h3>Working with Gatsby</h3>
If you’re just getting started with Gatsby, we recommend experimenting with a Markdown based Gatsby starter like <a href="https://github.com/tinacms/tina-starter-grande" rel="nofollow ugc">Tina Grande</a>. Installation is as easy as:
<pre><code>git clone https://github.com/tinacms/tina-starter-grande.git

cd tina-starter-grande

yarn install && gatsby develop
</code></pre>
Then copy your exported WordPress Markdown into the <code>content</code> directory or point the wp gatsby-markdown-export command at the content directory.
Want to port your WordPress or HTML theme to Gatsby? Checkout <a href="https://www.gatsbyjs.org/docs/porting-an-html-site-to-gatsby/" rel="nofollow ugc">Porting an HTML Site to Gatsby</a> for tips.
<h3>Command Line Usage</h3>
The command line functionality uses WP-CLI to interact with WordPress. <a href="https://wp-cli.org/#installing" rel="nofollow ugc">WP-CLI is easy to install</a> if you haven’t already.
Once it’s installed, you can export content to a directory like this:
<pre><code>wp gatsby-markdown-export --directory=/example/gatsby-starter/src/content
</code></pre>
All CLI arguments are optional.
 Option 
 Description 
 Default value
 <code>--help</code> 
 get help
 <code>--directory=</code> 
 export output directory 
 random temp directory
 <code>--post_types=</code> 
 post types to export, see: https://developer.wordpress.org/reference/classes/wp_query/#post-type-parameters 
 page,post
 <code>--post_status=</code> 
 post status to export, see: https://developer.wordpress.org/reference/classes/wp_query/#status-parameters 
 any
 <code>--fields_to_markdown=</code> 
 fields to convert to Markdown 
 excerpt
 <code>--excluded_front_matter=</code> 
 fields to exclude from front matter
 <code>--post_date_format=</code> 
 format for post publish date, see: https://www.php.net/manual/en/function.date.php 
 c
 <code>--upload_dir=</code> 
 directory in the export to copy WordPress uploads 
 uploads
 <code>--remap_fields=</code> 
 remap front matter field names, example: find1,replace1;find2,replace2
 <code>--fields_to_array=</code> 
 convert single value front matter fields to arrays
 <code>--include_private_fields=</code> 
 private post meta fields to include (they start with _)
 <code>--skip_copy_uploads</code> 
 flag, skips copying WordPress uploads to the export
 <code>--skip_original_images</code> 
 flag, skips the use of original dimension images
 <code>--skip_enforce_charset</code> 
 flag, skips use of blog_charset for the XML charset
 <code>--create_type_directory</code> 
 flag, creates directories based on post type

WP Gatsby Markdown Exporter

Export WordPress content to Markdown for GatsbyJS.

MarkDown Block vs WP Gatsby Markdown Exporter