Cleave.js number 4 last week, climbs the charts to get the top position this week.
For formatting an input field while the user is typing, we could also mention Text Mask.
At position number 2, Zero is a new Node.js server that aims to provide the simplest developer experience, requiring “zero configuration”, hence the name.
From a bunch of files at the root of your project you get a web server handling everything, the routing is made according to the file names.
Files served by a Zero server can be HTML files (of course), JSX, Markdown, but also MDX (a mix of JSX and Markdown).