These were removed in HTML5. They still render, but they mix presentation into markup and are ignored by some engines.
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How this rule is weighted
- Importance
- 3 / 10
- How much this matters relative to other rules.
- Confidence
- SPECIFICATION
- A standard says so: HTML, WCAG, an RFC or Google's own documentation.
- Severity
- warning
- How the finding is presented when it fails.
- Scoring
- Counts
- A failure costs points in its category.
Impact is importance multiplied by the confidence tier’s weight — SPECIFICATION 1.0, RESEARCH 0.7, EMERGING 0.3, EXPERIMENTAL 0.1. Two rules backed by the same class of evidence therefore always carry the same weight, which is what makes the score reproducible rather than hand-tuned.
Questions about this rule
- Does HTML_DEPRECATED_ATTRS affect my score?
- Yes. It is an importance 3 rule at SPECIFICATION confidence, so a failure costs 3 × 1 points of impact in the HTML category before that category is normalised to 100.
- What does SPECIFICATION confidence mean?
- A standard says so: HTML, WCAG, an RFC or Google's own documentation. Confidence is a declared tier rather than a per-rule number, so every rule backed by the same class of evidence carries the same weight - which is what makes the score reproducible instead of hand-tuned.
- How do I check HTML_DEPRECATED_ATTRS on my own site?
- Paste your URL into the box above and it runs only this rule, usually in a couple of seconds. It is also included in the HTML checker and in a full scan.
Tags
- html
- w3c
- deprecated
Related HTML rules
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- Markup parses without structural errorsChecks the raw HTML source for structural mistakes the browser silently repairs: nested anchors and forms, block elements inside paragraphs, bare table rows, nested headings and unterminated attributes. These never appear in the parsed DOM, so they are invisible to tools that inspect a rendered page - but they mean the DOM you get is not the DOM you wrote.HTML_PARSE_ERRORS
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