I have a question about how the answer is rendered. I have noticed that many HTML codes seem to work in the preview of the answer but don't appear the final answer. Why are these blocked?
The short answer is we use two different Markdown libraries to render the preview and the final answer. These two different libraries treat HTML differently.
Our answers are styled and formatted using a markup language called "Markdown." Markdown converts predefined markup into HTML for links, images, headers, italics, emphases, etc.