HTML & CSS · page 4

Combine cascade, naming, duplication, responsive, accessibility, and maintainability checks.

Flag elements used in ways that conflict with their intended semantic role.

Check label and control identifiers for missing or ambiguous associations.

Review sandbox, allow, title, and referrer policy attributes on embedded frames.

Identify automatic page refresh and redirect declarations.

Compare semantic outlines from two versions of the same page.

Generate rendering checks for common email client layout limitations.

Find invalid nested interactive elements and likely accessibility problems.

Detect unclosed, mismatched, and incorrectly nested elements.

Measure nesting depth and flag unnecessarily deep markup.

Count elements by tag name across an HTML document.

List attributes and their usage throughout a document.

Detect labels and links referencing nonexistent element IDs.

Identify repeated attributes within individual HTML tags.

Locate obsolete HTML elements and suggest modern alternatives.

Identify obsolete attributes that may need replacement.

Identify unrecognized tags and possible spelling mistakes.

Find empty elements that may indicate incomplete markup.

Review whether document elements communicate appropriate semantic meaning.

Remove selected HTML comments from source code.

Sort attributes consistently according to a configurable convention.

Standardize quoted attribute values in HTML source.

Test whether text is safely escaped before insertion into HTML.

Inspect line breaks and paragraph boundaries in HTML content.