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IMA.js – Testování aplikace
8.12.2020
V minulých dílech jsme úspěšně vytvořili plně funkční IMA.js aplikaci na předpověď počasí. Abychom zajistili, že tato aplikace zůstane funkční i nadále a s dalšími úpravami nic nerozbijeme, doplníme ji o sadu jednoduchých, ale mocných testů
How to create a client-serverless Jamstack app using Netlify, Gatsby and Fauna
3.12.2020
The Jamstack is a modern web development architecture based on client-side JavaScript, reusable APIs, and prebuilt Markup.
The key aspects of a Jamstack application are the following:
The entire app runs on a CDN (or ADN). CDN stands for Content Delivery Network and an ADN is an Application...
Minimal Takes on Faking Container Queries
2.12.2020
It’s sounding more and more likely that we’re actually going to get real container queries. Google is prototyping a syntax idea from David Baron and refined by Miriam Suzanne. Apparently, there has already been some prototyping done for a switch() syntax which is like container queries...
Lots of Ways to Use Math.random() in JavaScript
30.11.2020
Math.random() is an API in JavaScript. It is a function that gives you a random number. The number returned will be between 0 (inclusive, as in, it’s possible for an actual 0 to be returned) and 1 (exclusive, as in, it’s not possible for an actual 1 to be returned).
Math.random(); // returns...
A Complete State Machine Made With HTML Checkboxes and CSS
27.11.2020
State machines are typically expressed on the web in JavaScript and often through the popular XState library. But the concept of a state machine is adaptable to just about any language, including, amazingly, HTML and CSS. In this article, we’re going to do exactly that. I recently built a website...
Rendering Spectrum
25.11.2020
Here are the big categories of rendering websites:
Client: ship a <div id="root"></div> and let a JavaScript template render all of it.
Static: pre-render all the HTML.
Server: let a live server process requests and generate the HTML response.
They are not mutually exclusive....
DRY-ing up styled-components
23.11.2020
I like working with styled-components. They allow you write CSS in your JavaScript, keeping your CSS in very close proximity to your JavaScript for a single component. As a front-end developer who loves to dissect a web page and break it down into reusable components, the idea of styled-components...
Detect Generator Functions with JavaScript
23.11.2020
In the current JavaScript climate of new syntaxes, features, and using loads of external libraries, it seems harder than ever to be sure what your functions are being given or even what the data represents. Of course, we’ve come up with Flow and TypeScript to help, but we can’t count...
console.log({ myVariable });
19.11.2020
I think this might be my most popular tweet of all time, but I’m not sure how to verify that these days. I’ll restate this neat little trick here because blogging is cool and fun.
I used to do this a lot while debugging JavaScript:
console.log("myVariable: ", myVariable);
But now I...
Node isConnected
13.11.2020
Every so often I discover a property in JavaScript objects that I didn’t know existed, oftentimes using another trick to accomplish the same functionality. One such property I just learned about was isConnected, a node property that attached to a context (i.e. document). Here’s how...
ARIA in CSS
11.11.2020
Jeremey reacting to Sara’s tweet, about using [aria-*] selectors instead of classes when the styling you are applying is directly related to the ARIA state.
… this is my preferred way of hooking up CSS and JavaScript interactions. Here’s [an] old CodePen where you can see...
JavaScript Operator Lookup
9.11.2020
Okay, this is extremely neat: Josh Comeau made this great site called Operator Lookup that explains how JavaScript operators work. There are some code examples to explain what they do as well, which is pretty handy.
My favorite bit of UI design here are the tags at the bottom of the search...
How to Animate the Details Element Using WAAPI
5.11.2020
Animating accordions in JavaScript has been one of the most asked animations on websites. Fun fact: jQuery’s slideDown() function was already available in the first version in 2011.
In this article, we will see how you can animate the native <details> element using the Web Animations...
Additive Animations in CSS
3.11.2020
Daniel C. Wilson explains how with CSS @keyframe animations, when multiple of them are applied to an element, they do both work. But if any properties are repeated, only the last one works. They override each other. I’ve seen this limitation overcome by applying keyframes to nested elements...
Limit Promise Concurrency with pool
3.11.2020
Methods like Promise.all, Promise.allSettled, Promise.race, and the rest are really excellent for managing multiple Promises, allowing for our apps to embrace async and performance. There are times, however, that limiting the number of concurrent operations may be useful, like rate limiting...
Collective #630
26.10.2020
Three.js Journey * Phosphor Icons * Understanding Modules, Import and Export in JavaScript
The post Collective #630 appeared first on Codrops
Smarter Ways to Generate a Deep Nested HTML Structure
21.10.2020
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...
“Durable”
20.10.2020
Looks like the word “durable” is an emerging term in the world of serverless. As I understand it, it’s like allowing for state in places you wouldn’t normally expect to have it. For example, you call some cloud function and run some JavaScript… unless you have it...
cookieStore: Async Cookie API
20.10.2020
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
19.10.2020
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...