My wanted Markdown features

• Markdown-it extended with HyperPug
• CSS is allowed (inside <style></style> tags, scoped-by-default via scope-css)
• Emoji, Image resize, and more

Also, the editor will auto-create images and x-card on clipboard paste (i.e. Ctrl+V).

To use x-card webcomponent, simply include

<script src="https://unpkg.com/@patarapolw/make-html-x-card"></script>

To support old browsers, you might also need @webcomponents/webcomponentsjs

<script src="https://unpkg.com/@webcomponents/webcomponentsjs/webcomponents-loader.js"></script>
<script type="module" src="https://unpkg.com/@patarapolw/make-html-x-card"></script>

make-html is fully libre in addition to being fully free. Libre means that you and every successive user of the software inherit the same rights, freedoms, and priveledges as the original author of the software. This generous concession is made possible via the power of the GNU GPL version 3 or later license.