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Reverse Lookups with JavaScript

28.8.2019
I’ve always loved exploring regular expressions because they’re one of those skills that’s never taught in school — you need to pick them up on the fly, messing up and fixing them along the way. Regex’s are incredibly powerful, and one power they have are referred...

How to Build Firefox

27.8.2019
Open source is a dream and a gateway to an amazing career — I’m a testament to that. One of the most amazing open source projects to ever exist, Mozilla Firefox, is a project I’m proud to work on as an employee of Mozilla. It’s rewarding, challenging, and a unique...

45 Web Tools To Master The Internet (Sponsored)

26.8.2019
A big part of our daily jobs is accomplished with much ease and efficiency by using different web tools and services. There is no doubt that for any type of need there is a great solution that is doing its job. In this article, we are reviewed on short 45 web tools and services that […] The...

Popular Web Tools and Services Among Designers & Developers (Sponsored)

26.8.2019
Today we will present you the most popular 30 web tools and services among designers and developers. We handpicked solutions that are offering the best functionalities, support, and pricing on the market. You will find probably the best logo design creating software, the very well-known Hotjar...

Promises and Static Values

23.8.2019
Async can throw a real wrench into the cogs of our programming workflows, all despite the fact that async is the modern JavaScript pattern. While async/await helps, there’s sometimes confusion about the way to have a single function that returns a value whether it exists or needs a Promise...

Navbar Nudging on @keyframers

22.8.2019
I got to be the featured guest over on The Keyframers the other day. We looked at a Dribbble shot by Björgvin Pétur Sigurjónsson and then slowly built it, taking some purposeful detours along the way to discuss various tech. We start by considering doing it entirely in CSS, then go for some light...

Mercurial Tips

19.8.2019
While most of the world seems to be using git for version control, Mozilla continues to use Mercurial (hg) to manage the Firefox source code. As a git and GitHub lover, it took me a while to get used to Mercurial. I don’t consider myself a hg expert but I know enough to complete...

Data URIs

18.8.2019
We’re all familiar with traditional URI protocols like https, http, ftp, and file, but data URIs have become a large part of our online strategy. We can use them to display images, the Mac camera and webcams, and more. But what if we simply want to use a data URI to convey basic data? Typing...

Sony XAV-AX8000 promění jakékoli auto v Teslu s obrovskou dotykovou obrazovkou

13.8.2019
Máte starší automobil, který sám o sobě nenabízí podporu nějakého pokročilejšího propojení s telefonem? Pak by vás mohla zaujmout následující novinka, která „udělá z vašeho auta Teslu“. Řeč je o nové verzi přijímače Sony XAV-AX8000, který ke svému fungování vyžaduje jen jednu pozici DIN pro

How to Crop Videos

9.8.2019
During a recent episode of the Script and Style podcast, I had noticed that the video recording had showed a bit of our internal chat that wasn’t necessary for our viewers to see. While there’s nothing wrong with giving viewers a peek into the show preparation, presenting the best...

then on Objects

5.8.2019
Promises were a revelation in JavaScript development, allowing us to enjoy async processing and avoid callback hell. Many new APIs like Battery API, Cache API, and others use the promise API. One fact you may not know is that you can add a then method to any object to make it Promise-like!...

Intrinsically Responsive CSS Grid with minmax() and min()

31.7.2019
The most famous line of code to have come out of CSS grid so far is: grid-template-columns: repeat(auto-fill, minmax(10rem, 1fr)); Without any media queries, that will set up a grid container that has a flexible number of columns. The columns will stretch a little, until there is enough room...

CSS prefers-reduced-motion Media Query

30.7.2019
When I started in the web development industry, media queries were limited — screen and print were the two media queries I was most often using. More than a decade later, media queries have advanced to various screen units, feature checking, and even color scheme preference. I’ve been...

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...

JavaScript Proxy with Storage

26.7.2019
The JavaScript Proxy API provides a wealth of “magic” within JavaScript, allowing you to use any object as sort of an alias that allows a wall of validation, formatting, and error throwing. Did you know that you could also employ the Proxy API as an abstraction to different types...

Grab a .DEV Domain from Hover! (Sponsored)

19.7.2019
I can say that the biggest and best changes in my professional life came from starting this blog — it was the springboard for conference speaking, open source, and joining Mozilla. I’ve always urged ever developer to have a blog to showcase talent, explore new technology, and to network. What’s...

Collective #533

18.7.2019
Is postMessage slow? * Reduced Motion Auto-Play Video * Repo Lovers * Think in Math. Write in Code. Collective #533 was written by Pedro Botelho and published on Codrops

Detect Cryptocurrency by Wallet Address

16.7.2019
I’ve always been a massive advocate of cryptocurrency. I love the technology, the ease of use, and the freedom that cryptocurrencies bring to the world. Despite my love of crypto, I know that adoption will take a long time and that the state of crypto is not friendly to new adopters. One scary part...

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