These days I found out the very useful feature on Visual Studio Code for markdown editing, which renders the MD file on VSCode itself, opening a new tab at right.
However, the rendered markdown styles matches VSCode itself. Since I mainly use markdown on GitHub, I’d like to preview the markdown using GitHub style. So I inspected GitHub and made a quick CSS file to VSCode:
Save the file and add this entry to VSCode user settings, which on Linux looks like this:
"markdown.styles": ["/home/your_name/.config/Code/User/eu-markdown.css"]
The markdown preview should be pretty close to GitHub styling now.