Array.prototype.includes is an ECMAScript proposal by Domenic Denicola and Rick Waldron. It is at stage 4 (finished) and part of ECMAScript 2016.

Async functions are an ECMAScript proposal by Brian Terlson. It is at stage 3 (candidate).

Before I can explain async functions, I need to explain how Promises and generators can be combined to perform asynchronous operations via synchronous-looking code.

The exponentiation operator (**) is an ECMAScript proposal by Rick Waldron. It is at stage 4 (finished) and part of ECMAScript 2016.

We always knew that ECMAScript 2016 (ES2016) would be a small release. It turns out that it will be very small. Read on for a list of its features and an explanation why that is not a problem.

Today, Johannes Weber and I are launching a new weekly email newsletter: ES.next News.

In this blog post, I present enumify, a library for implementing enums in JavaScript. The approach it takes is inspired by Java’s enums.

This blog post explains that classes have lexical inner names, just like named function expressions.

One nice npm feature is that you can install packages with executables locally. This blog post explains how to run locally installed executables.

This blog post explains four approaches for managing private data for ES6 classes:

1. Keeping private data in the environment of a class constructor
2. Marking private properties via a naming convention (e.g. a prefixed underscore)
3. Keeping private data in WeakMaps
4. Using symbols as keys for private properties

My latest book is called “Setting up ES6”. It covers the following topics:

• A cheat sheet for deploying ECMAScript 6
• Example setups (skeleton projects that you can download from GitHub):
  • ES6 in browsers via webpack and Babel
  • ES6 in Node.js via Babel (compiled dynamically or statically)
• How to configure Babel 6, including a clear explanation of how it interacts with CommonJS modules