Rewriting HTML output - where to start? #641

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claunia · 2026-01-29T14:41:49Z

claunia commented

2026-01-29 14:41:49 +00:00

Originally created by @NetTecture on GitHub (Nov 29, 2023).

I need to add additional classes - the bootstrap extension is nice, but it is "only" doing "standard" bootstrap, which is not enough. I need in particular:

to add more .class depending on the context in markdown

Example would be to have a HR before the 2nd H2 to isolate the top paragraph, or another HR before the last H2.

rewrite the URL of images also based on context.

The use case here is to change the URL to be a specific size, depending on the context again - but mostly depending on the theme. Full original size is behind a click.

Originally created by @NetTecture on GitHub (Nov 29, 2023). I need to add additional classes - the bootstrap extension is nice, but it is "only" doing "standard" bootstrap, which is not enough. I need in particular: * to add more .class depending on the context in markdown Example would be to have a HR before the 2nd H2 to isolate the top paragraph, or another HR before the last H2. * rewrite the URL of images also based on context. The use case here is to change the URL to be a specific size, depending on the context again - but mostly depending on the theme. Full original size is behind a click.

claunia added the question label 2026-01-29 14:41:49 +00:00

claunia commented

2026-01-29 14:41:50 +00:00

@xoofx commented on GitHub (Nov 29, 2023):

It will be most likely a mix of rewriting some of the builtin renderers and change things in the document object model before rendering it back.

@xoofx commented on GitHub (Nov 29, 2023): It will be most likely a mix of rewriting some of the builtin [renderers](https://github.com/xoofx/markdig/tree/master/src/Markdig/Renderers/Html) and change things in the document object model before rendering it back.

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Reference: starred/markdig#641