Exploring the Contrast of window, screen, and document in JavaScript delves into the nuances of these core components in JavaScript. To summarize the key points from the accepted answer while expanding on additional insights:
window
serves as the pivotal object in JavaScript. Any declarations of variables or functions are encapsulated within the realm of the window
object. This means that if you define a variable like var something="blah"
within a script tag, you have multiple ways to reference it - either directly as something
, through window.something
, or using window["something"]
.
screen
emerges as a direct child of the overarching window
entity, established by the browser itself. Thanks to this structural relationship, you can access screen
via window.screen
or simply by its name screen
. The information stored within screen
pertains to the characteristics of the physical screen display, making it a valuable resource for retrieving specific details (unless you opt for frameworks like jQuery or Prototype which offer seamless compatibility across browsers).