what happens when we "do math" on a JavaScript object?

using the spread operator with two objects

shortcuts and combinations for common Git commands

checking the validity of JavaScript types with this library

summarizing the internet's de facto version control system

getting some version control on your computer

launching a React app/website onto a github.io subdomain

clean up the branch list with this one-liner command-line command

adding user interactivity to a webpage

adding descriptions to objects of a web page

organizing similar records of data together on a webpage

dividing up a webpage with "container tags" (other names for <div>)