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Nalezeno "JavaScript": 158

Smarter Ways to Generate a Deep Nested HTML Structure


Let’s say we want to have the following HTML structure: <div class='boo'<div class='boo'<div class='boo'<div class='boo'<div class='boo'</div</div</div</div</div That’s real a pain to write manually. And the reason why this post was born was being...

cookieStore: Async Cookie API


One pattern in the JavaScript API world that web development veterans will notice is that we’ve been creating new methods to accomplish what older, grosser APIs once achieved. XMLHttpRequest became the fetch API, some APIs like Battery became async, and there are dozens of other examples....

How to Prevent Pasting into an Input


Every once in a while I get to a website that doesn’t allow me to paste into a form input. In most cases it’s something to do with login credentials (username and or password) and auth codes. So how are they preventing me from pasting information? It’s as easy as you’d...

How to Conditionally Add Attributes to Objects


JavaScript is full of tricks that you don’t know you want until you … want … them. Or maybe just until you see them. One trick I recently realized was conditionally adding attributes to React elements. Of course this trick essentially boils down to conditionally adding properties...

Ryan stvořil Deno a bylo to dobré


S nadsázkou se dá prohlásit, že vzniku Deno vděčíme hryzavému svědomí Ryana Dahla, autora NodeJS. Za jedenáct let, které dělí první verzi NodeJS a první verzi Deno, se ve světě referenčního JavaScriptu událo mnohé. Následovník NodeJS je proto mnohými vítán

How to Detect When a Sticky Element Gets Pinned


The need for position: sticky was around for years before it was implemented natively, and I can boast that I implemented it with JavaScript and scroll events for ages. Eventually we got position: sticky, and it works well from a visual perspective, but I wondered how can we determine when...

The Flavors of Object-Oriented Programming (in JavaScript)


In my research, I've found there are four approaches to Object-Oriented Programming in JavaScript. Which methods should I use? Which one is "the best" way? Here I'll present my findings along with information that may help you decide which is right for you. The post The Flavors of Object-Oriented...

How to Create an Async Function


One thing I love about JavaScript is that there are many ways to accomplish the same task, one such example being creating functions. There are several patterns for functions; one of the last you see used is the new Function method: /* new Function(arg1, arg2 (...), body) */ const myFunction =...

IMA.js – Detailní pohled na komponenty, eventy a extensions


V předchozím díle jsme si na naší aplikaci s předpovědí počasí ukázali, jak vykreslit data pomocí Views a rozdělili jsme si HomeView do podrobnějších komponent. V tomto díle uděláme naši aplikaci pro uživatele zajímavější a přidáme možnost jak zadávat lokalitu

Logical Assignment Operators


I love JavaScript, it’s my favorite programming language, but I love dipping into other languages because they offer a new perspective on coding paradigms. There’ve been syntax additions to JavaScript that I’ve seen I found interesting (think ?? in optional chaining) and now...

Working with JavaScript Media Queries


What’s the first thing that comes to mind when you think of media queries? Maybe something in a CSS file that looks like this: body {   background-color: plum; } 
 @media (min-width: 768px) {   body {     background-color: tomato;   } } CSS media queries are a core ingredient in any responsive...

Designing a JavaScript Plugin System


WordPress has plugins. jQuery has plugins. Gatsby, Eleventy, and Vue do, too. Plugins are a common feature of libraries and frameworks, and for a good reason: they allow developers to add functionality, in a safe, scalable way. This makes the core project more valuable, and it builds a community...

Match Emojis with Regular Expressions


When experimenting with unicode property escapes, to identify accented letters in strings, it reminded me of a question I had a few years ago: what is the best way to identify and then replace emojis in a string? I first noticed this practice when using emojis in Facebook — sometimes Facebook...

Simple Node.js Proxy


When I wanted to refresh my React.js skills, I quickly moved to create a dashboard of cryptocurrencies, their prices, and and other aspects of digital value. Getting rolling with React.js is a breeze — create-react-app {name} and you’re off and running. Getting the API working...

PSF Token Invokes the First Coin-Age Staking Protocol on Bitcoin Cash


During the last six months, the Simple Ledger Protocol has grown immensely and there’s been 9,604 SLP tokens created since the infrastructure launched. Just recently news.Bitcoin.com reported on mistcoin, the mineable SLP token that can be mined with a CPU. Now software developer Chris...

Nailing the Perfect Contrast Between Light Text and a Background Image


Have you ever come across a site where light text is sitting on a light background image? If you have, you’ll know how difficult that is to read. A popular way to avoid that is to use a transparent overlay. But this leads to an important question: Just how transparent should that overlay...

Match Accented Letters with Regular Expressions


Regular expressions are used for a variety of tasks but the one I see most often is input validation. Names, dates, numbers…we tend to use regular expressions for everything, even when we probably shouldn’t. The most common syntax for checking alphabetic characters is A-z but what...

Expanding the Future (of Dev Tooling) with AI


Codota wants their tools to (at least!) double developer productivity. My vision is that we can do that not only by getting more developers using these tools, but in expanding where and how these tools learn themselves. The better the tools can *learn from us* what we're doing, the better *we...

Promise.allSettled


The Promise object has many useful functions like all, resolve, reject, and race — stuff we use all the time. One function that many don’t know about is Promise.allSettled, a function that fires when all promises in an array are settled, regardless of whether any of the promises...

A Lightweight Masonry Solution


Back in May, I learned about Firefox adding masonry to CSS grid. Masonry layouts are something I’ve been wanting to do on my own from scratch for a very long time, but have never known where to start. So, naturally, I checked the demo and then I had a lightbulb moment when I understood...

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