I recently found the need to strip frontmatter from source markdown files. After far too long playing around with regex101.com I finally came up with the following expression to work the magic.
Frontmatter is a code block found at the beginning of a file and is used to manage meta data for that page of content. I’m working with frontmatter in YAML format so the code block is enclosed with — characters.
The term Frontmatter originated with the publishing industry, referencing anything in the first section of a book, for example, a Table of Content, or a Preface.