The reason your project, among hundreds of JavaScript Projects, was broken for hours because someone unpublished a piece of their work known as Left-pad.

Introduction Musch is a lightweight JavaScript environment designed for musical composition and live-coding. With Musch, you can create dynamic musical compositions on-the-fly by writing code, ...

Usage Use the JS Scratch Pad Sublime command to open a scratch pad in Sublime. Type in your JS code and hit alt+shift+r to run it. The plugin adds the following key bindings.

It ended up with Koçulu deleting an 17-line npm package called 'left-pad', which thousands of Node.js programs rely on to function.