If there are any -isms (reverse-isms are not counted), any NSFW content, or illegal content. Websites will be declined if any of the above criteria are met.
Use HTML, CSS, scripting (JS or serverside)-in that order-to do things. Use the ones more to the beginning of the list to do things.
Your website must have a Lighthouse accessibility and best practices score of 100 and a performance score over 90. Every file must also be compressed reasonably, and support for older browsers is not required.
Your CSS needs to be really robust. If it relies on finicky browser-specific things, doesn't import fonts, doesn't have different media queries, etc... it won't be accepted.
Everything in your website should be accessible so that it's not a pain to look at or interact with. This includes hiding longer text that's less important.
If the site's not open source software, it won't be accepted. Period.
Awesome! Click this link and you're on your way to joining Miniclub. Congrats!