E02 — Every Piece of JavaScript Runs Inside a Room

Every time JavaScript runs a function, it builds something first. A containedenvironment, with its own variables, its own rules, its own sense of identity. Mostdevelopers run functions hundreds of times a day without knowing this ishappening. It is happening every single time. Here is the medium article https://medium.com/@gize.bonilla/0e8275391f58