Which inline HTML styles does GitHub Markdown accept?

After GitHub converts Markdown to HTML, The HTML is sanitized, aggressively removing things that could harm you and your kin—such as script tags, inline-styles, and class or id attributes. See the sanitization filter for the full whitelist. You’re right: style tags are not included in the whitelist. They are ignored. The permitted attributes differ by … Read more

How to create a good-looking notification or warning box in Github Flavoured Markdown?

As Waylan mentions in his answer, Github strips script and style tags from the markdown before displaying it. This means the only possibilities for notification boxes that will render on Github are those provided by native markdown or html. After some searching and experimenting, I discovered it is possible to (ab)use the tables syntax, and … Read more