In this video, I'll be writing a neovim plugin. If you're new to neovim, or if you just want to watch an interesting plugin writing process, then watch this video! This video shows how to use the treesitter APIs in Lua to grab information about some Typescript code, then modifies text in the buffer. It should be fun. Chapters 0:00 - Intro 1:13 - Query syntax 2:33 - Using treesitter playground 10:02 - What we're building 11:53 - Setting up the lua plugin 14:35 - Figuring out the first query 16:05 - Using the query in Lua 18:55 - Getting TSNode at the cursor 21:43 - Getting parent nodes 26:22 - Getting nodes recursively 27:44 - A bit of refactoring... 28:56 - Welcome along to the ride... 20:57 - Crafting the output string 33:46 - table.concat 35:32 - Writing the result to the buffer 39:36 - it didn't work. 42:13 - it works!