如何用JavaScript正则实现食谱内容的正确格式化与换行？

Here are the standard Markdown formatting conventions to apply to content:

• Headings: Use number signs (#) at the start of the line. The count of # determines the heading hierarchy:

  • # Level 1 Heading (largest)
  • ## Level 2 Heading
  • ### Level 3 Heading (smaller)

• List Items: Begin each list entry with a dash (-). For nested lists, indent the items:

  • Main list item
    • Sub-list item

• Emphasized Text: Wrap text with asterisks (*):

  • Italicize text: *this text is italic* → this text is italic
  • Bold text: **this text is bold** → this text is bold

• Code/Commands: Enclose code snippets with backticks (`):

  • Inline code: `npm install` → npm install
  • Multi-line code blocks: Use three backticks (```) on lines before and after the code:

    def hello():
        print("Hello World")
    

• Quoted Text: Prefix lines with greater than signs (>):

  • > This is a quoted paragraph.

  This is a quoted paragraph.

• Links: Format as [Display Text](Target URL) — wrap the visible link text in square brackets, followed by the URL in parentheses.

• Images: Format as ![Alt Text](Image URL) — start with an exclamation mark, then wrap descriptive alt text in square brackets, followed by the image's URL in parentheses.

内容的提问来源于stack exchange，提问作者Rakitha