Code blocks

No formatter or linter looks inside a code block or an HTML block, so the parser first decides which lines are code.

The document is parsed as CommonMark with the GFM tables, strikethrough and task lists, by pulldown-cmark, which gives every block the bytes of the source it covers. The lines it marks are exactly the ones a CommonMark renderer shows as code or passes through as HTML:

• Fenced block: opens with three or more backticks or tildes. It closes with a line of the same character, at least as long. A block that never closes runs to the end of its container, and fences reports it.
• Indented block: a line indented by four or more columns that does not continue a paragraph. Columns count from where the text of its list item or blockquote starts.
• HTML block: starts with a line such as <div>, <p align="center"> or <!--. It runs to its closing tag or to the next blank line, as CommonMark defines for each kind. Its id and name attributes still define anchors.
• Front matter: YAML between two --- lines, or TOML between two +++ lines, starting on the first line of the document. It is data for the tools that publish the document, so no rule reads it as Markdown.

1. An item.

   A paragraph of the item, not code.

       Code inside the item.

> ```bash
> code inside a blockquote
> ```

Fences, indentation and HTML blocks work the same inside lists and blockquotes, at any depth.