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What the Next 4 Years of Ethereum Look Like
31.7.2019
Ethereum celebrated its fourth birthday yesterday. Here's what insiders had to say about the blockchain's next four
[aktualita] ECJ: používání Facebook like tlačítka přenáší na firmy zodpovědnost za údaje uživatelů
31.7.2019
Tím, že na své stránky umístí tlačítko like sociální sítě Facebook, umožňují firmy technicky přenos osobních údajů uživatelů a nesou tak za ně zodpovědnost. Takový je alespoň ve zkratce výklad pondělního rozhodnutí European Court of Justice, soudního dvora Evropské unie. ECJ tímto rozhodnutím...
A More Accessible Portals Demo
31.7.2019
The point of the <portal> element (behind a flag in Chrome Canary) is that you can preload another whole page (like <iframe>), but then have APIs to animate it to the current page. So "Single Page App"-like functionality (SPA), but natively. I think that's pretty cool. I'm a fan...
How much specificity do @rules have, like @keyframes and @media?
31.7.2019
I got this question the other day. My first thought is: weird question! Specificity is about selectors, and at-rules are not selectors, so... irrelevant?
To prove that, we can use the same selector inside and outside of an at-rule and see if it seems to affect specificity.
body {
background:...
Run useEffect Only Once
30.7.2019
React has a built-in hook called useEffect. Hooks are used in function components. The Class component comparison to useEffect are the methods componentDidMount, componentDidUpdate, and componentWillUnmount.
useEffect will run when the component renders, which might be more times than you think....
Exploring the SLP Token Universe Built on the Bitcoin Cash Chain
29.7.2019
Since last August, the Simple Ledger Protocol (SLP) has become a prevalent application within the Bitcoin Cash ecosystem. So far there’s been thousands of SLP tokens created, a number of which have been very popular and used regularly. Tokens have been issued by governments like Liberland...
Getting design system customization just right
29.7.2019
I had a little rant in me a few months ago about design systems: "Who Are Design Systems For?" My main point was that there are so many public and open source ones out there that choosing one can feel like choosing new furniture for your house. You just measure up what you need and what you like...
The Guardian digital design system
29.7.2019
Here’s a fascinating look at The Guardian’s design system with a step-by-step breakdown of what's gone into it and what options are available to designers and developers. It shows us how the team treats colors, typography, layouts, and visual cues like rules and borders.
I’ve been struggling...
Optional Chaining
29.7.2019
For all of the improvements that the JavaScript language has added over the past few years, like the spread operator, default argument values, and arrow functions, there are still a few features I’d love to see implemented. On such feature is optional chaining. Optional chaining allows...
Datalist is for suggesting values without enforcing values
26.7.2019
Have you ever had a form that needed to accept a short, arbitrary bit of text? Like a name or whatever. That's exactly what <input type="text"> is for. There are lots of different input types (and modes!), and picking the right one is a great idea.
But this little story is about something...
My Favorite Netlify Features
25.7.2019
👋 Hey folks! Silvestar pitched this post to us because he is genuinely enthusiastic about JAMstack and all of the opportunities it opens up for front-end development. We wanted to call that out because, although some of the points in here might come across as sponsored content and Netlify...
Responsive Iframes
25.7.2019
Say you wanted to put the CSS-Tricks website in an <iframe>. You'd do that like this:
<iframe src="https://css-tricks.com"></iframe>
Without any other styling, you'd get a rectangle that is 300x150 pixels in size. That's not even in the User Agent stylesheet, it's just some...
What I Like About Vue
25.7.2019
Dave Rupert digs into some of his favorite Vue features and one particular issue that he has with React:
I’ve come to realize one thing I don’t particularly like about React is jumping into a file, reading the top for the state, jumping to the bottom to find the render function, then following...
Zdog
24.7.2019
David DeSandro has loads of super cool JavaScript libraries he's created over the years. His latest is Zdog, a "round, flat, designer-friendly pseudo-3D engine for canvas & SVG." It's only been about a month since he dropped it (although, like any good library, it's been simmering) and it...
Don’t comma-separate :focus-within if you need deep browser support
24.7.2019
I really like :focus-within. It's a super useful selector that allows you to essentially select a parent element when any of its children are in focus.
Say you wanted to reveal some extra stuff when a <div> is hovered...
div:hover {
.extra-stuff {
/* reveal it */
}
}
That's...
My New Mac Setup and Why I Switched
24.7.2019
I want to start this article by saying that I'm not here to start or take part in any brand war between Microsoft and Apple. I like both companies and have switched between operating systems occasi
Zoom, CORS, and the Web
23.7.2019
It's sorta sad by funny that that big Zoom vulnerability thing was ultimately related to web technology and not really the app itself.
There is this idea of custom protocols or "URL schemes." So, like gittower:// or dropbox:// or whatever. A native app can register them, then URLs that hit them...
CSS :not() with Multiple Classes
22.7.2019
Say you want to select an element when it doesn't have a certain class. That's what the :not() selector is for.
body:not(.home) {
}
But what if there are multiple classes you want to avoid?
There are no logical combinators with :not(), like and or or, but you can chain them, which...
CSS Animation Libraries
22.7.2019
There are an awful lot of libraries that want to help you animate things on the web. These aren't really libraries that help you with the syntax or the technology of animations, but rather are grab-and-use as-is libraries. Want to apply a class like "animate-flip-up" and watch an element, uhhh...
Why You Can’t Bet With Bitcoin at Online Casinos in the US
20.7.2019
Since the dawn of Bitcoin, the cryptocurrency landscape has seen a lot of digital currency gaming websites where users can wager their coins in games like poker, dice, blackjack and slots. Because public blockchains are transparent, the protocols have made online gaming provably fair. However...