Originally JavaScript didn't support ``++class++``es, and class-like behavior had to be kludged using things like ``++prototype++`` assignments for "class" functions. Fortunately, ECMAScript 2015 added classes, so any lingering ``++prototype++`` uses should be converted to true ``++class++``es. The new syntax is more expressive and clearer, especially to those with experience in other languages. Specifically, with ES2015, you should simply declare a ``++class++`` and define its methods inside the class declaration. == Noncompliant Code Example ---- function MyNonClass(initializerArgs = []) { this._values = [...initializerArgs]; } MyNonClass.prototype.doSomething = function () { // Noncompliant // ... } ---- == Compliant Solution ---- class MyClass { constructor(initializerArgs = []) { this._values = [...initializerArgs]; } doSomething() { //... } } ---- ifdef::env-github,rspecator-view[] ''' == Implementation Specification (visible only on this page) include::message.adoc[] include::highlighting.adoc[] ''' == Comments And Links (visible only on this page) include::comments-and-links.adoc[] endif::env-github,rspecator-view[]