In JavaScript, scope refers to the visibility of variables. Variables which are defined outside of a function block have Global scope. This means, they can be seen everywhere in your JavaScript code.

The global object provides variables and functions that are available anywhere. By default, those that are built into the language or the environment. In a browser it is named window, for Node.js it ...

30 November, 2011. It was a Wednesday. I hear a lot of talk about how it’s a performance penalty to use globally scoped variables in JavaScript (not to mention, dangerous / dumb). When a function ...