Options to allow the html tag which disabled by micromark-extension-gfm-tagfilter package

[percy507]

Initial checklist

• I read the support docs
• I read the contributing guide
• I agree to follow the code of conduct
• I searched issues and couldn’t find anything (or linked relevant results below)

Problem

The micromark-extension-gfm-tagfilter package filter the iframe tag which I really need.

Use case: after copying iframe embedded code from youtube, I will paste it in my editor. Before pasting, I will use micromark to handle the plaintext in the clipboard, so I can convert markdown into html string and also keep the raw html string. Then I will convert the html string into html document object and then submit them into the editor to parse it.

Solution

Refactor the excape rules of micromark-extension-gfm-tagfilter package, then offer an option keepTags to prevert filtered them.

// eg
gfmHtml({
  keepTags: 'iframe,style'
})

Alternatives

Offer options to disable micromark-extension-gfm-tagfilter package in micromark-extension-gfm. Then user can write their own tagfilter extension and also use the other gfm packages with import them separately.

[ChristianMurphy]

Similar to #6
Micromark GFM is designed to implement GFM.
If you want not-GFM (as you are suggesting here), the individually released plugins can be combined in a way to your liking.

[percy507]

OK. Thanks.