Javascript Closure: How to Use Closure in JavaScript

Javascript Closure is the aggregate of functions clumped together with the references to its surrounding environment.

Javascript Closure is the aggregate of functions clumped together with the references to its surrounding environment. It gives you an outer function’s scope from an internal function. Scopes are contexts of variables. Every object has a link to the scope chain, local first, then parents, and then Global Scope. The Closureallows a function to carry its scope from another context, or we can say another lexical scope.

Javascript Closure

A Closure is the javascript feature that happens. We do not worry about it. Javascript engine creates the Closure, and we have its advantage to use it.

javascript javascript closure

Closures are something that many companies would like you to know before working for them, therefore, Most developers today, know about closures in Javascript. Don’t be sad if you don’t, it’s not something you generally use on your every-day work (well, you may, but it’s not so common).

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The essential JavaScript concepts that you should understand - For successful developing and to pass a work interview

Variables in JavaScript have two types of scoping i.e. Local and Global scope. If any variable is declared inside a function, then it is a local variable and if the variable is declared outside the function then it is global variable. The scope of variables is defined by their position in the code.

Closure is one of most important and core concepts in JavaScript. With Closures we can achieve memoization