Pretty sure it always autosaved so this makes sense to me? I always assume it would send my data over to their backend, its code that ends up there regardless?

Look into https://www.fullstory.com/ , many major websites use this, it's basically a real-time video view of the user's browser screen. You can see where they move their mouse, how quickly they are typing, each character one at a time.

I worked for a company that would have phone support for users, and we'd be watching their screens giving gentle suggestions to them as they were using our app for how to do what they needed to do. We never offered up what we were doing, but given users' poor descriptions of what they were doing, FullStory was an amazing customer service tool.

You're gonna be shocked how many input fields do this for various UX features :)

Reddit does this. Every keystroke you type into a comment box is sent back to them. So, that means even if you decided to cancel posting something, they still receive what you wrote. I have been known to write responses that were harsh and angry, and I simply don't send. Sometimes it's therapy for me to think through something while typing whatever is in my head. Then I go back and edit once I have have thought it through. I don't want that info sent back. So, I tend to not involve myself with much online anymore. I don't want to expose myself to the thought police.

I find the browser the most unsafe piece of tech deployed.

CodePen does not disclose this in neither ToS nor in Privacy Policy, only in Builds documentation they say: “As you work on CodePen, your Pens are constantly running through the CodePen Compiler”

There’s a detailed discussion of the same issue here https://www.reddit.com/r/webdev/comments/1rj1oac/i_planted_f...

This is so it can restore any unsaved changes.

I take no opinion on whether this is good or bad, but I can see how from a UX perspective it's nice not to lose 10 minutes of work because your browser crashes or something.

the 'it's just autosave' defense in the comments is interesting. is keystroke-level granularity actually needed for that though?

because this is how autocomplete logic works i guess? Frontend cannot guess language and completions for you

For basic previewing I like to use https://htmledit.squarefree.com which has been online for years and does it all client side.

I'm looking forward to the Gamers Nexus exposé

Sent to them to render the preview pane. Same as pasting secrets anywhere on a browser.

Wait until you find out copying content on a computer might sent it over Wi-Fi/Bluetooth for sharing on other devices.

if you paste secrets in any website you should be fired immediately

i made my own html playground that is browser only and shares preview via url hash because of these useless shenanigans of codepen, its not as featureful but i mostly use it for sharing single page html files

https://easyanalytica.com/tools/html-playground/