Simplifying JavaScript Public Class Fields

Introduction

This blog post will guide you through the new JavaScript public class fields, providing a simple tutorial on how to use them. In the past, creating a public class field required instantiating the field in the constructor. However, with the introduction of the class fields proposal, available in Chrome 72 and Node 12, a new and simpler syntax is now available. Let’s dive in and explore how to use this feature effectively.

Traditional Approach

In the traditional approach, creating a public class field involved declaring the field within the constructor:

class Counter {
  constructor() {
    this.count = 0;
  }
}

New Syntax: Class Fields Proposal

With the introduction of the class fields proposal, you can now declare public class fields directly within the class:

class Counter {
  count = 0;
}

Benefits of the New Syntax

The new syntax simplifies the code by eliminating the need to instantiate class fields within the constructor. This leads to cleaner and more intuitive code, making it easier to read and understand.

Conclusion

In this tutorial, we have explored the new JavaScript public class fields and how they simplify the code. By using the new syntax provided by the class fields proposal, you can create public class fields more efficiently and improve the readability of your code.