Why doesn't HTML have error messages?

Question

Sooo, I did make some HTML codes but if I write something wrong, it doesn't show an error message. The same with CSS. I know that they aren't scripting languages but still, I feel like they should have error messages.

Answer 1

Browsers parse HTML code permissively. This means, the code is parsed best possible, even if there are errors.

You can use the Markup Validation Service of W3C to check your HTML code for markup validity:

https://validator.w3.org