22 posts tagged with "javascript"

I just added a small site and API at rovarspraket.tammergard.se for translating to and from robber language (Swedish: rövarspråket). The background — the rules, the edge cases, and eleven progressive JavaScript implementations — is in the older post Robber language generator.

Today is .

I just added a small API to roman.tammergard.se for converting between arabic and roman numerals.

In Sweden, today is 's nameday.

I just added a small API to namnsdag.tammergard.se for looking up namedays in Sweden, Norway, Denmark, Germany, Czechia and Poland.

While Number() and parseInt() are similar, there are important differences. Let's explore them!

I recently stumbled upon the JavaScript equality table. I'm always impressed by nice ways of visualizing such concepts. And I immediately thought it would be a fun thing to build myself!

Choose between double equals and triple equals to see how that affects the equality table.

I recently stumbled upon a bug related to the subtle differences between mouse, touch and pointer events. The bug made me confused—and curious. What is actually the difference between these events?

I opened an issue for the bug that you can check out if you're also curious—but before trying to understand the bug, we need to set the stage with some knowledge around different types of events.

|| and ?? are similar, but there's some very important nuance. Take a look at this example:

const a = "" || "default value"
// > "default value"

const b = "" ?? "default value"
// > ""

Let me explain.

You live close to , right?

How did I know that? I used Ipapi! A neat API for getting the location of IP addresses, with 30,000 free lookups per month.

I've had some fun with random colors lately! To speed up development, I made a utility function for getting a random color. It's really simple:

export const getRandomColor = () => {
	const red = Math.floor(Math.random() * 256)
	const green = Math.floor(Math.random() * 256)
	const blue = Math.floor(Math.random() * 256)

	const color = `rgb(${red}, ${green}, ${blue})`

	return color
}

When you generate URLs from titles, the title typically can't be used directly — spaces, question marks and other special characters don't belong in URL slugs. That's where a slugify function comes in handy.