Chapter 8: JavaScript’s New Private Class Fields, and How to Use Them
by Craig Buckler
ES6 introduced classes to JavaScript, but they’re too simplistic for complex applications. Class fields (also referred to as class properties) aim to deliver simpler constructors with private and static members. The proposal is currently at TC39 stage 3: candidate and could appear in ES2019 (ES10).
A quick recap of ES6 classes is useful before we examine class fields in more detail.
ES6 Class Basics
JavaScript’s prototypal inheritance model can appear confusing to developers with an understanding of the classical inheritance used in languages such as C++, C#, Java and PHP. JavaScript classes are primarily syntactical sugar, but they offer more familiar object-oriented ...
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