This is a tracking bug for the work we have to do to prepare the Web/API documentation for Markdown conversion.

• remove id attributes except on headings: filed as [Markdown] [ Web/API] Remove id attributes #7899
• deal with hidden code blocks in live samples: filed as [Markdown] [ Web/API] Fix usages of <div class="hidden"> containing code blocks #7901
• remove hidden elements that don't contain code blocks in a live sample: filed as [Markdown] [Web/API] Remove hidden elements that don't contain live sample code blocks #7902
• remove summary and seoSummary class: filed as [Markdown] [Web/API] Remove summary and seoSummary classes #8110
• remove inline styles: fixed in [Markdown] Remove inline styles from Web/API docs #5438 and [Markdown] [Web/API] Remove inline styles from Web/API #8503
• make note/warning consistently formatted: filed as [Markdown] [Web/API] Make notes and warnings consistently formatted #8180
• fix broken dl elements: filed as [Markdown] (Web/API] Fix unconvertible <dl> elements #8474
• deal with sup and sub
• fix live samples that use IDs which are not simple derivations of heading text: filed as [Markdown] [Web/API] Fix live samples which use heading IDs that are not derived from heading text #8509
• remove random CSS classes: filed as [Markdown] [Web/API] Remove unsupported CSS classes #8364
• remove unsupported elementsL fixed in [Markdown] (Web/API] Remove unsupported elements from Web/API #8504
• ensure tables are converted appropriately
• fix broken <strong><code> markup: fixed in [Markdown] [Web/API] Fix unconvertible strong/code markup #8544