Demystifying ES6 Classes And Prototypal Inheritance | DigitalOcean

Introduction In the early history of the JavaScript language, a cloud of animosity formed over the lack of a proper syntax for defining classes like in most object-oriented languages. It wasn’t until the ES6 spec release in 2015 that the class keyword was introduced; it is described as syntactical sugar over the existing prototype-based inheritance. At its most basic level, the class keyword in ES

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ES2015の`class`構文についての解説。 クラスの定義や使い方、継承について