JS Window
Window is the browser page global object. Browser APIs differ from the global objects available in a worker or server runtime.
Where to run this
Use a local browser project for this example. It needs browser permissions, additional files, a server endpoint, or a library as described below. The restricted playground cannot provide those dependencies.
A practical example
console.log(window.innerWidth);
console.log(window.innerHeight);
What happens
A local page console reports the viewport dimensions.