[epolanski]

When I used to do interviews to frontend developers I often had them write a form with validation...in plain HTML and a sprinkle of js for some of the final validation touches.

Was kinda surprised at how many senior leetcode blackbelts didn't know HTML had built in validation :)

JS was required for some of the more complex validation logic and mounting few dom nodes (and again, surprisingly, many didn't know how to create an element and mount it!).

On the other hand I got to learn lots of nice tricks to complete some of the features (elements had to appear with conditional logic) with CSS only which was nice.

[AdrianB1]

HTML has built in validation, but the behavior and control over it is not great. I am using it in my projects to some extent, but it does not cover 100% of the needs. Because of that, some people skip it completely and almost forget it does exist.

[zahlman]

>Was kinda surprised at how many senior leetcode blackbelts didn't know HTML had built in validation :)

Judging by the websites I've had to deal with in the last few years, a lot of web devs don't know that HTML has built in form submission. Or that it's possible to, say, display images without JavaScript (looking squarely at you, Imgur).