This is possible in JavaScript thanks to first-class functions, which means that functions in JavaScript can be passed around like any other variable.

Closely related to the mathematical higher-order function concept is the first-class function, which is a functional programming function that takes other functional programming functions as ...

However, unlike Node.js, Deno offers first-class support for Microsoft's increasingly popular Typescript, a superset of JavaScript designed for large projects.

First look: Qt 5 makes JavaScript a first-class citizen for app development The community behind the Qt project has issued an alpha release of Qt 5.