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An impressively low-level article that we hope gives you a good idea about what happens in V8 when it comes to optimization.

My latest book, Mastering Modular JavaScript, just went into Early Release and is available now on Safari Books Online. It’s a part of my “Modular JavaScript” effort. It covers module thinking, patterns & principles.

When it comes to JavaScript, modularity is a modern concept. In this article we’ll quickly revisit and summarize the milestones in how modularity evolved in the …

A human decides to open a new tab in their favorite web browser and they then google for “cat in a pickle gifs”. What happens next will shock you!

Images are crucial to website performance, but most sites still don’t implement responsive images. Cloudinary provides an alternative to srcset and sizes when implementing responsive images.

We discuss how Object#toString performs in the V8 engine, why it’s important, how it changed with ES2015 symbols, and how to speed it up.

Last month, I was interviewed after delivering a presentation on ECMAScript to an audience in Shenzhen, China. I think it was an entertaining interview, so here’s a transcript.

There’s a proposal in stage 1 for the Null Propagation operator. In this article we’ll take a look at the proposal, which offers an alternative to null …

There’s a stage 0 proposal for pattern matching in JavaScript. In this article we’ll take a look at what the proposal entails and also show how you might …

Let’s take a look at how we can quickly hash out a correct two-factor authentication (2FA) solution for our web applications. First off, let’s work out the …

Last week, I gave a presentation at Tencent Frontend Conference in Shenzhen, China. For this article, I’ve adapted its transcript.

In this article we’ll take a look at regular expressions improvements in and after ES6. We’ll discuss the /y, /u, and /s flags, named capture groups, unicode property escapes, lookbehind assertions, and String#matchAll.

As it turns out, iterators can be written using generators. This can lead to some interesting use cases.

There’s an ECMAScript proposal for Observables in the works. In this article we explore the proposal, the API, and look at a few use cases.

Observables in …

Using const only means that the variable will always have a reference to the same object or primitive value, because that reference can’t change.

The Content-Security-Policy header is a bit frightening — will I break my website if I suddenly start blocking requests for external resources? In this article we go over a gradual approach to adopting CSP.

Angular 2 is the rave of the moment. It is a modern JavaScript framework that is supercharged with awesome features. In fact, Angular 2 is now more than a framework, it …

JavaScript has gone from being a marketing ploy to gain a tactical advantage, to becoming the core programming experience in the world’s most widely used application runtime platform. Where to, next?