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Nalezeno "JavaScript": 798

#posobota 29.4. na téma synchronization

23.4.2023
Opět naživo, offline. V Praze v kancelářích LMC – Menclova 2538/2, Praha 8-Libeň Letos poprvé a naposledy v Praze. Čeká na vás 6 řečníků napříč tématy mezi backendem, frontendem a přesahem do softskills. Program Vstup…

JavaScript Array Group

17.4.2023
Managing, sorting, and manipulating data with JavaScript is a skill we’ve often delegated to third party libraries like lodash. As the JavaScript language progresses, however, these features eventually get. added to the JavaScript specification. Two such APIs for grouping of Array data...

How to Get a Base64 Version of a File From Command Line

13.4.2023
A while back I wrote an article on how to Convert Image to Data URI with JavaScript. It’s a neat trick developers can use for any number of reasons. Instead of abusing canvas, however, why not simply get the base64 data from command line? You can use base64 and pbcopy to convert a file...

Detect the Content Type in the Clipboard

6.3.2023
A user’s clipboard is a “catch all” between the operating system and the apps employed on it. When you use a web browser, you can highlight text or right-click an image and select “Copy Image”. That made me think about how developers can detect what is in...

Healthcare, Selling Lemons, and the Price of Developer Experience

9.2.2023
Every now and then, a one blog post is published and it spurs a reaction or response in others that are, in turn, published as blogs posts, and a theme starts to emerge. That’s what happened this past week and … Healthcare, Selling Lemons, and the Price of Developer Experience...

fetch with Timeout

16.1.2023
A few years back I wrote a blog post about how write a fetch Promise that times out. The function was effective but the code wasn’t great, mostly because AbortController , which allows you to cancel a fetch Promise, did not yet exist. With AbortController and AbortSignal available...

Customizing HTML Form Validation

9.1.2023
Form validation has always been my least favorite part of web development. You need to duplicate validation on both client and server sides, handle loads of events, and worry about form element styling. To aid form validation, the HTML spec added some new form attributes like required and pattern...

How to Determine a JavaScript Promise’s Status

3.1.2023
Promises have changed the landscape of JavaScript. Many old APIs have been reincarnated to use Promises (XHR to fetch, Battery API), while new APIs trend toward Promises. Developers can use async/await to handle promises, or then/catch/finally with callbacks, but what Promises don’t tell...

Detect XR Support with JavaScript

2.1.2023
A few years ago I wrote an article about how to detect VR support with JavaScript. Since that time, a whole lot has changed. “Augmented reality” became a thing and terminology has moved to “XR”, instead of VR or AR. As such, the API has needed to evolve. The presence...

Document.elementFromPoint

30.12.2022
Reacting to events with JavaScript is the foundation of a dynamic experiences on the web. Whether it’s a click event or another typical action, responding to that action is important. We started with assigning events to specific elements, then moved to event delegation for efficiency, but...

Detect Browser Bars Visibility with JavaScript

30.12.2022
It’s one thing to know about what’s in the browser document, it’s another to have insight as to the user’s browser itself. We’ve gotten past detecting which browser the user is using, and we’re now into knowing what pieces of the browser UI users are seeing....

JavaScript print Events

30.12.2022
Media queries provide a great way to programmatically change behavior depending on viewing state. We can target styles to device, pixel ratio, screen size, and even print. That said, it’s also nice to have JavaScript events that also allow us to change behavior. Did you know you’re...

How to Control CSS Animations with JavaScript

27.12.2022
When it comes to animations on the web, developers need to measure the animation’s requirements with the right technology — CSS or JavaScript. Many animations are manageable with CSS but JavaScript will always provide more control. With document.getAnimations, however, you can...

Detecting Fonts Ready

26.12.2022
Knowing when resources are loaded is a key part of building functional, elegant websites. We’re used to using the DOMContentLoaded event (commonly referred to as “domready”) but did you know there’s an event that tells you when all fonts have loaded? Let’s learn how...

CSS Infinite and Circular Rotating Image Slider

2.12.2022
Image sliders (also called carousels) are everywhere. There are a lot of CSS tricks to create the common slider where the images slide from left to right (or the opposite). It’s the same deal with the many JavaScript libraries out … CSS Infinite and Circular Rotating Image Slider originally...

Collective #739

24.11.2022
State of JavaScript 2022 Survey * An Interactive Guide to Flexbox in CSS * Design Threads

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