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Hi all,

Trying in this tool :

I tried minimizing the source-code of that same page. The minimized code does not validate. Particularily, the <!DOCTYPE html> is reduced to <!doctypehtml>, which is not okay.

To reproduce:

  • Copy this minimal HTML code:
<!DOCTYPE html>
<html lang="en">
	<meta charset="UTF-8" />
	<div class="mydiv">Stuff</div>
  • paste it on that same page
  • minify it
  • try to validate the minified code.


Minified code is

<!doctypehtml><html lang=en><meta charset=UTF-8><title>Page</title><div class=mydiv>Stuff</div>

Which is not valid:

Error: Missing space before doctype name. At line 1, column 10


Minified code should be valid, ie be atleast this:

<!doctype html><html lang=en><meta charset=UTF-8><title>Page</title><div class=mydiv>Stuff</div>

End notes

This is the only error on my minimal HTML code example. If you try minifying the HTML of the online tool itself, you’ll find another error, most similar.

Appart from that it seems to do the job. Thanks for that all!

Issue Analytics

  • State:closed
  • Created 4 years ago
  • Reactions:2
  • Comments:17

github_iconTop GitHub Comments

j9tcommented, Oct 11, 2021

IMHO, validating minified HTML is like trying to lint minified JavaScript code — you’re validating the wrong thing! We should be validating the authored, unminified HTML, and then ideally trusting the HTML minifier to do its job.

I’d beg to differ (largely because of the current shape of frontend dev) but it’s an interesting conversation to be had. Probably not here though?

XhmikosRcommented, Oct 11, 2021

Yeah, but it’s unsafe and we do have other unsafe options disabled by default. Disabling removeTagWhitespace on the website too brings things on par with the CLI 😃

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