The problem is intermittent.. since it's DNS related, browser caching behavior may be slightly different (also depending on your usage)

ah got it. also realized i have no idea how to check which dns i'm using out of the list i've entered.

Also have issues here (using cloudflare's 1.1.1.1)

It's working in Belgium but not in the Netherlands

Maybe they are more decentralized than what we are giving them credit. I'm having different error messages (nginx, dns, 404) on different websites. Not sure if it's a full breakdown of their systems or a coordinated attack.

My sites on Hetzner (Germany) are coming up fine as well.

Hey HN,

I want to explain my motivation for working on this course. I'll start by saying that this is a paid course.

HTML and CSS have a relatively low barrier to getting into. Moreover, browsers are very lenient, and the HTML specification itself allows you to make mistakes. However, we've been neglecting semantic HTML for a very long time (and sometimes accessibility). This is why I wanted to work on a detailed step-by-step course that teaches HTML and CSS while focusing on semantics and accessibility from the start.

For example, `div` is only introduced in Chapter 49. Most challenges require you to pass automated accessibility checks (color contrast, main landmark, headings hierarchy, etc.)

Let me know what you think!

Hey HN,

I've built this Interactive JavaScript Knowledge Map that allows developers to get a glance at _most_ topics in modern JavaScript.

Students that are following https://LearnJavaScript.online, will be able to track their progress using this knowledge map. It becomes interactive as they will be able to see the completed branches and click on them to go back to the related lesson. They also have a progress bar that completes as they further progress in the course.

Let me know what you think!

Thanks! Weird, it shouldn't ask for GitHub login twice. When was the second time that it asked? Was that maybe on the flashcards app?

Yes, I think it was indeed the flashcards part.

Hey Hacker news! I built this Augmented Reality visualization last year to help the students of my [learnprogramming.online](https://learnprogramming.online) course understand how arrays work in programming, mostly with regards to index access. If you're a long time developer, you're probably already used to indices starting at 0 so it was a bit challenging to take a step back and show this for beginners!

It may not run in AR mode, depending on your device. So here's a video of how it works: https://res.cloudinary.com/dbfn5lnvx/video/upload/q_auto/v15...

This is built using WebXR :D

Yep, it's pretty much in the browser!

cool, let me know if you've got any comments/suggestions

looks very sweet! I like the UI more then Scrimba. One suggestion is the ability to skip forward to future lessons using the navigation on the left. I wanted to do that to see what the React stuff was like.

Thanks! I was actually debating how much of the content should be free but then I realised that the First Project (Project I) has to be part of the free content to show a feel of the entire platform