markup-validator

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apply apache mod_negotitation module for browser accept-languages.

Joungkyun

The online validator fails to detect and validate HTML5 and shows "The error was: Modification of a read-only value attempted "

1

https://validator.w3.org/ seems to be broken to detect automatically encoding and doctype. Complete error message says: "Sorry, I am unable to validate this document because on line 1 it contained one...

GwenDragon

https://validator.w3.org/check?uri=referer does not check the referring page, but a random page from the web, totally unrelated to the referring page, for example http://www.robothumb.com/stats.html or http://www.wpu.edu.ph/ , while the referring page...

YvesMarcoux

warning: failed to load external entity "http://www.w3.org/TR/MathML2/dtd/isonum.ent"

8

Dear all, I am trying to understand the following issue in Debian: * https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1003933 If I understand correctly `w3-dtd-mathml` package did install a catalog such that: ``` ``` This is...

malaterre

`check/referer` gives confusing results due to more default restrictive referer policies in browsers

7

eg, following `` from `http://users.ugent.be/~jaschmid/` seems to validate `http://users.ugent.be/` (wrongly); while `` works well. --- Reported by @jamesrschmidt

tripu

In the "Validate by URI" address field, the hostname is decoded the same way as the rest of the URI. This causes unicode hostnames to be badly decoded. For example,...

ZettaScript

https://validator.w3.org/check?uri=referer no longer (?) checking actual referer, but my homepage

4

All my webpages contain this link, however I notice that all links now result in the checking of my home page, and not the actual referer. I'm sure this didn't...

PeterBDa

If you validate an HTML file served over HTTPS, the HTML snippet that you are offered to embed "valid" icons in your page includes attribute values with "http://" rather than...

kshawkin

SVG should not require <style type>

4

The following document produces an error, but I believe it shouldn't. ```svg * { fill: blue } ``` > Line 4, Column 9: required attribute "type" not specified in ``...

edemaine

Error 404

1

Hello, please excuse my poor English. Last year I asked for the same problem. I have my homepage: https://eberhard-koch.de/. When I'm using the Nu Html Checker almost everything is fine:...

MahatmaHattie