Editing JavaScript (section)

=== Functional ===
{{Main|Functional programming}}

JavaScript [[Subroutine|functions]] are [[first-class function|first-class]]; a function is considered to be an object.<ref>{{cite web|title=Function&nbsp;– JavaScript|url=https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function|access-date=2021-10-30|website=[[MDN Web Docs]]|language=en-US}}</ref> As such, a function may have properties and methods, such as <code>.call()</code> and <code>.bind()</code>.<ref>{{cite web | url=https://es5.github.com/#x15.3.4-toc | title=Properties of the Function Object | publisher=Es5.github.com | access-date=May 26, 2013 | archive-date=January 28, 2013 | archive-url=https://web.archive.org/web/20130128185825/https://es5.github.com/#x15.3.4-toc | url-status=live }}</ref>

==== Lexical closure ====
{{Main|Closure (computer programming)}}

A ''nested'' function is a function defined within another function. It is created each time the outer function is invoked.

In addition, each nested function forms a [[Closure (computer programming)|lexical closure]]: the [[Scope (programming)#Lexical scoping vs. dynamic scoping|lexical scope]] of the outer function (including any constant, local variable, or argument value) becomes part of the internal state of each inner function object, even after execution of the outer function concludes.{{Sfn|Flanagan|2006|p=141}}

==== Anonymous function ====
{{Main|Anonymous function}}

JavaScript also supports [[anonymous function]]s.