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Site Report

This tab shows pages that do not comply with W3C standards.

StatusSummary
FailureW3C HTML/XHTML Validation - Some pages fail validation.
FailureW3C CSS Validation - Some pages fail validation.
SuccessW3C Deprecated Features - No issues found.
PriorityDescription and URLGuideline and Line#Count

Priority 1

10 issues on 1 pages

CriticalAn img element must have an alt attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images. HTML5 1 pages
https://suttacentral.net/Line 2705
CriticalAttribute :by-polymer-bundler not allowed on element. HTML5 1 pages
https://suttacentral.net/Line 86
CriticalBad value for attribute href. HTML5 1 pages
Bad value 'https://fonts.googleapis.com/css?family=Noto+Sans|'. Unexpected character |Noto+Serif in query string
https://suttacentral.net/		Line 38 48
CriticalCSS Validation Error. CSS Validation 1 pages
https://suttacentral.net/Line 185 185 1367 1387 1387 ...
CriticalDuplicate id - the same ID is used on more than one element. HTML5 WCAG 2.0 A 4.1.1 Section 508 (2017) A 4.1.1 1 pages
`id=book`.
https://suttacentral.net/		Line 305 372 1462 2066 2149 ...
CriticalElement script must not have attribute async unless attribute src or type=module is also specified. HTML5 1 pages
https://suttacentral.net/Line 2699
CriticalElement script must not have attribute defer unless attribute src is also specified. HTML5 1 pages
https://suttacentral.net/Line 2729
CriticalElement style not allowed as child element in this context. HTML5 WCAG 2.0 A 4.1.1 Section 508 (2017) A 4.1.1 1 pages
https://suttacentral.net/Line 181
CriticalSaw <!-- within a comment. Probable cause : Nested comment (not allowed). HTML5 1 pages
https://suttacentral.net/Line 83
https://suttacentral.net/Line 85 2513 2514 2515 2516 ...

Priority 2

1 issues on 1 pages

Very ImportantStart tag seen without seeing a doctype first. Expected <!DOCTYPE html>. HTML5 1 pages
https://suttacentral.net/Line 1 1

Informative

These messages are for information only and do not indicate errors

InformationProperty or at-rule is vendor specific. CSS Validation 1 pages
Properties and at-rules prefixed by a dash or underscore, the zoom property and the expression() function are vendor specific and only work on one browser engine.
-webkit-font-smoothing -webkit-font-smoothing
https://suttacentral.net/		Line 1387 1387 2642
Expand all 12 issues