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49 lines
1.6 KiB
Markdown
49 lines
1.6 KiB
Markdown
# `MD041` - First line in a file should be a top-level heading
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Tags: `headers`, `headings`
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Aliases: `first-line-h1`, `first-line-heading`
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Parameters:
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- `front_matter_title`: RegExp for matching title in front matter (`string`,
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default `^\s*title\s*[:=]`)
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- `level`: Heading level (`integer`, default `1`)
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This rule is intended to ensure documents have a title and is triggered when
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the first line in the file isn't a top-level (h1) heading:
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```markdown
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This is a file without a heading
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```
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To fix this, add a top-level heading to the beginning of the file:
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```markdown
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# File with heading
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This is a file with a top-level heading
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```
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Because it is common for projects on GitHub to use an image for the heading of
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`README.md` and that is not well-supported by Markdown, HTML headings are also
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permitted by this rule. For example:
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```markdown
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<h1 align="center"><img src="https://placekitten.com/300/150"/></h1>
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This is a file with a top-level HTML heading
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```
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Note: The `level` parameter can be used to change the top-level (ex: to h2) in
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cases where an h1 is added externally.
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If [YAML](https://en.wikipedia.org/wiki/YAML) front matter is present and
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contains a `title` property (commonly used with blog posts), this rule will not
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report a violation. To use a different property name in the front matter,
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specify the text of a regular expression via the `front_matter_title` parameter.
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To disable the use of front matter by this rule, specify `""` for
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`front_matter_title`.
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Rationale: The top-level heading often acts as the title of a document. More
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information: <https://cirosantilli.com/markdown-style-guide#top-level-header>.
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