Scope in JavaScript refers to context (or portion) of the code which determines the accessibility (visibility) of variables. In JavaScript, we have two types of scope, local , and global .

A lot of shiny new features came out with ES2015 (ES6). And now, since it's 2020, it's assumed that a lot of JavaScript developers have become familiar with and have started using these features.

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 ...