# JavaScript Public Class Fields

> Learn how JavaScript public class fields let you declare a field like count = 0 directly in the class body, instead of setting it inside the constructor.

Author: [Flavio Copes](https://flaviocopes.com/about/) | Published: 2019-07-15 | Topics: [JavaScript](https://flaviocopes.com/tags/js/) | Canonical: https://flaviocopes.com/javascript-public-class-fields/

In the past, to create a public class field we would have used this syntax, instantiating the field in the constructor:

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

The new [class fields proposal](https://github.com/tc39/proposal-class-fields), which you can use since Chrome 72 and Node 12, allows us to use this syntax:

```js
class Counter {
  count = 0
}
```

Much simpler!