Scalability is sometimes confused with performance, but it’s not at all the same thing.

In this post, we’ll take a closer look at what both of those things mean, with the help of a simple model!

Using the right approach, you can get past the Chrome inspector’s UI and call its internal API directly.

This lets us debug live webpages using JavaScript instead of buttons!

With a shift in perspective, we can view complex type declarations as another kind of code. Code where types are values.

There’s no better example of this than the type-level map. Let’s take a closer look!

Every iframe gets a complete copy of the JS web environment, down to every prototype chain.

Let’s see what horrifying things can happen when we interact with it!

A synthetic iframe is one that doesn’t have web address. It's filled by its parent page instead.

Let’s take a look at every single way you can create one.

What makes an object a DOM node? Is it the prototype or something else?

The answer turns out to be surprisingly complicated!

Iframes are omnipresent and very useful, yet they're also complicated and confusing.

Let’s take a broad look at how they work.

There used to be just one type of script tag, but after decades of web standards development, we have tons of them.

Let’s take a look at every single one!