Text Highlight in Markdown

Text Highlight in Markdown

Within a Markdown editor I want to support text highlight, not in the sense of code highlighting, but the type of highlighting people do on books.

In code oriented sites people can use backquotes for a grey background, normally inline code within a paragraph. However on books there is the marker pen for normal text within a paragraph. That is the classical black text on yellow background.

Is there any syntax within Markdown (or its variants) to specify that the user want that type of highlight? I want to preserve the backquotes syntax for code related marking, but also want a way to enable highlighted user text

My first thought is just using double backquotes, since triple backquotes are reserved for code blocks. I am just wondering if other implementations have already decided a syntax for it... I would also appreciate if someone could justify if this is a very bad idea.

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7 Answers

As the markdown documentation states, it is fine to use HTML if you need a feature that is not part of Markdown.

HTML5 supports

<mark>Marked text</mark>

Else you can use span as suggested by Rad Lexus

<span style="background-color: #FFFF00">Marked text</span>
6

I'm late to the party but it seems like a couple of markdown platforms (Quilt & iA Writer) are using a double equal to show highlighting.

==highlight==
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Typora is also using double equal for highlighting. It would be nice it that becomes a CommonMark standard, as mentioned by DirtyF. It would be nice for those who use it frequently, since it is only 4 repeated chars: ==highlight==

If you want the option to use multiple editors, it may be best to stick with <mark>highlight</mark> for now, as answered by Matthias.

Here is the latest spec from CommonMark, "which attempts to specify Markdown syntax unambiguously". Currently "highlighting" is not included.

Editors using ==highlight== from comments mentioned previously:

  • Typora
  • Obsidian
  • Quilt
  • IA Writer

Feel free to add to this list.

1

Grey-colored Higlighting Solution

A possible solution is to use the <code> element:
This solution works really well on git/github, because git/github doesn't allow css styling.

OBS!:
Using the code-element for highlighting is not semantic.
However, it is a possible solution for adding grey-colored highlighting to text in markdown.

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David Miller

David Miller brings 15 years of experience in global economics, personal finance strategy, and market dynamics. He specializes in turning complex economic trends into actionable insights for everyday readers.