Six nifty ES6 tricks

In this blog post, I show six tricks enabled by new ES6 features. At the end of each section, I point to related material in my book “Exploring ES6” (which is free to read online).


Handling whitespace in ES6 template literals

In this blog post, we look at problems that arise when template literals contain whitespace:

  • Breaking up long lines
  • Dedenting content
  • Joining Arrays
  • Indenting inserted content


Trees of Promises in ES6

This blog post shows how to handle trees of ES6 Promises, via an example where the contents of a directory are listed asynchronously.


Tracking unhandled rejected Promises

In Promise-based asynchronous code, rejections are used for error handling. One risk is that rejections may get lost, leading to silent failures. For example:

    function main() {
        .then(() => console.log('Done!'));

If asyncFunc() rejects the Promise it returns then that rejection will never be handled anywhere.

Let’s look at how you can track unhandled rejections in browsers and in Node.js.


Promise-based functions should not throw exceptions

This blog post gives tips for error handling in asynchronous, Promise-based functions.


The need for multi-platform npm packages

In this blog post, I argue that it should be possible to have multiple implementations of the same npm package (same name, same version).


Arrow functions vs. bind()

ES6 arrow functions are often a compelling alternative to Function.prototype.bind().