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## Problem
The "One operand must be a number" (`operandnumber`) is incorrectly reported for CSS variable calculations that contain numeric values.
## Replicate
1. Go to https://validator.w3.o…
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The release of 4.0 broke my CI because the `--check-html` option was removed.
I don't see anything about the removal in the changelog.
I found commit 75d786c096 "Remove HTML parsing feature" whi…
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**Description**
Importing recipes from hellofresh.ch works just fine, but there are encoding issues with special characters like äüöîé etc.
**Reproduction**
Steps to reproduce the behavior:
1. I…
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The `` element has the following caveats.
> When a table element is the only content in a figure element other than the figcaption, the caption element **should** be omitted in favor of the figcapt…
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## Describe the bug
Feeds containing XHTML5 (e.g. Atom `` elements) may have valid (X)HTML5 attributes in the enclosed markup. Many of these attributes trigger an error.
I've noticed this for AR…
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**Steps to Reproduce**
1. Validate markup using the W3C Nu HTML Checker; note warnings.
**Current Behavior**
The `` element wrapping the navigation component has a redundant `role="navigation"` a…
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"Nu Html Checker" is unreachable.
"W3C CSS Validator (Level 2.1)" is unreachable.
"W3C CSS Validator (Level 3)" is unreachable.
"Feed Validator" is unreachable.
There is no result to display.
T…
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Note, 13th of February 2023: Next de facto discussion place until further notice is at #779.
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So today I learned that [GitHub threads max out at 2,500 comments](https://github.com/Da…
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The HTML spec has changed and [H62](https://www.w3.org/WAI/WCAG21/Techniques/html/H62) references an `rb` element that doesn't exist any more. The examples need re-writing and the Resources links need…
fstrr updated
2 years ago
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### Question
How do you deal with the errors Sprig causes in Nu Html Checker?