Obsidian Webviews was a plugin I made based on another plugin called Opengate.

It allowed you to open up any website as a tab inside of obsidian and manually override the styles of those sites to look like they are apart of the app. E.g. See below for a example of Todoist being shown on the right-hand side of this obsidian page.

This was my first time dealing with object-orientated programming for real, (outside of Minecraft modding).