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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...

Awesome Demos Roundup #18

28.10.2020
A big selection of the best web experiments made in the past weeks. The post Awesome Demos Roundup #18 appeared first on Codrops

How Hacker News Crushed David Walsh Blog

28.10.2020
Earlier this month, David’s heartfelt posting about leaving Mozilla made the front page of Hacker News. Traffic increased by 800% to his already-busy website, which slowed and eventually failed under the pressure. Request Metrics monitors performance and uptime for David’s blog, and our metrics...

Detect Changed Files with git

26.10.2020
There are numerous reasons to want to know which files have been added or modified in a git repository, one of which is your text editor highlighting those files. Another use case is running tasks against only files which are presently changed, like lint or other validation routines. So how can...

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...

How to Conditionally Add Attributes to Objects

16.10.2020
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...

Sports Data for Developers: SportdataAPI (Sponsored)

12.10.2020
Most of the side projects I consider starting revolve around sports, since I’m a huge sports fan. I spend my Saturdays watching soccer, Sundays spent watching soccer and NFL, and of course the mid-week Champions League and Europa League matches. One problem I’ve always had is not being...

39 Shirts – Leaving Mozilla

6.10.2020
In 2001 I had just graduated from a small town high school and headed off to a small town college. I found myself in the quaint computer lab where the substandard computers featured two browsers: Internet Explorer and Mozilla. It was this lab where I fell in love with Mozilla — a browser that...

Curate Custom Content with mediastack

6.10.2020
I used to have a personal aggregator of sites I enjoyed but maintaining it was a nightmare. I needed to grab each site’s RSS feed, categorize their contents, deal with errors and individual rate limits, etc. I had to tear the whole project down because it was a nightmare to manage. Fast...

How to Detect When a Sticky Element Gets Pinned

5.10.2020
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...

Shoelace 2.0: A Forward-thinking Library of Web Components

29.9.2020
A few years ago, I released a lightweight alternative to Bootstrap affectionately named Shoelace. Shoelace was small and fast because of its minimal design and pure CSS approach to styling. It used CSS custom properties extensively to enable customizations, even when loaded via CDN — something...

How to Detect the Default Branch in a git Repository

28.9.2020
Over the past few years, many engineering teams have switched their default git branch name from master to a different, potentially less offensive term. I’m all for choosing to name your default branch whatever you’d like, but not having a universal default branch name can complicate...

How to Create an Async Function

24.9.2020
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 =...

Vital Web Performance

21.9.2020
I hate slow websites. They are annoying to use and frustrating to work on. But what does it mean to be “slow”? It used to be waiting for document load. Then waiting for page ready. But with so many asynchronous patterns in use today, how do we even define what “slow” is? The W3C has […] The...

Remove the Search Input Clear(x) Icon

21.9.2020
I really appreciate the amount of different <input> elements we’ve received over the past decade. These elements don’t just bring a new semantic advantage, but also provide UI helpers, which in many cases are useful. In a recent case, I found a UI element not useful: the x (clear)...

5 Awesome JavaScript Promise Tricks

14.9.2020
The Promise API changed the game in JavaScript. We went from abusing setTimeouts and settling for synchronous operations to doing everything possible to leverage this new async API. Let’s check out a handful of awesome Promise API tricks! Cancel a fetch Request One problem we instantly...

Logical Assignment Operators

10.9.2020
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...

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