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Venezuela Blocks Opposition From Disbursing $18 Million To Health Workers via Bitcoin Exchange Airtm
25.8.2020
Venezuela has blocked the main opposition from distributing $18 million worth of cash previously seized by the U.S. from the Nicolas Maduro government. The money is being dished out via peer-to-peer (P2P) crypto exchange Airtm to 62,000 healthcare workers starting Monday. However, it is not...
Pausing a GIF with details/summary
22.7.2020
Steve Faulkner has a clever idea here. You can show an (animated) GIF and overlay a pause/play button on top of it — which is really a <details>/<summary> element. When toggled, a (non-animated) JPG inside covers the GIF, effectively “pausing” it.
Adrian Roselli calls...
Lazy Loading Images in Svelte
16.7.2020
One easy way to improve the speed of a website is to only download images only when they’re needed, which would be when they enter the viewport. This “lazy loading” technique has been around a while and there are lots of great tutorials on how to implement it.
But even with all the resources...
Lazy Load IFRAMEs
13.7.2020
We’ve known for a decade that lazy loading resources like JavaScript, CSS, and especially images is a massive performance win for web pages. At first we used tricks and JavaScript to do the lazy loading, but more recently native image lazy loading has debuted in browsers. Did you know that...
We need more inclusive web performance metrics
10.7.2020
Scott Jehl argues that performance metrics such as First Contentful Paint and Largest Contentful Paint don’t really capture the full picture of everyone’s experience with websites:
These metrics are often touted as measures of usability or meaning, but they are not necessarily meaningful...
Analyzing Notion app performance
8.6.2020
Here’s a fantastic case study where Ivan Akulov looks at the rather popular writing app Notion and how the team might improve the performance in a variety of ways; through code splitting, removing unused vendor code, module concatenation, and deferring JavaScript execution. Not so long ago, we made...
How to Convert a Date String into a Human-Readable Format
25.5.2020
I’ll be the first to admit that I’m writing this article, in part, because it’s something I look up often and want to be able to find it next time. Formatting a date string that you get from an API in JavaScript can take many shapes — anything from loading all of Moment.js to have...
The Fastest Google Fonts
22.5.2020
When you use font-display: swap;, which Google Fonts does when you use the default &display=swap part of the URL , you’re already saying, “I’m cool with FOUT,” which is another way of saying web text is displayed right away, and when the web font is ready...
Maintaining Performance
27.3.2020
Real talk from Dave:
I, Dave Rupert, a person who cares about web performance, a person who reads web performance blogs, a person who spends lots of hours trying to keep up on best practices, a person who co-hosts a weekly podcast about making websites and speak with web performance professionals…...
React Suspense in Practice
19.3.2020
This post is about understanding how Suspense works, what it does, and seeing how it can integrate into a real web app. We'll look at how to integrate routing and data loading with Suspense in React. For routing, I'll be using vanilla JavaScript, and I'll be using my own micro-graphql-react GraphQL...
Considerations When Choosing Fonts for a Multilingual Website
10.3.2020
As a front-end developer working for clients all over the world, I've always struggled to deal with multilingual websites — especially cases where both right-to-left (RTL) and left-to-right (LTR) are used. That said, I’ve learned a few things along the...
When CSS Blocks
28.2.2020
Tim Kadlec:
One particular pattern [for loading non-critical CSS] I’ve seen is the preload/polyfill pattern. With this approach, you load any stylesheets as preloads instead, and then use their onload events to change them back to a stylesheet once the browser has them ready.
So you're...
Do This to Improve Image Loading on Your Website
20.2.2020
Jen Simmons explains how to improve image loading by simply using width and height attributes. The issue is that there’s a lot of jank when an image is first loaded because an img will naturally have a height of 0 before the image asset has been successfully downloaded by the browser. Then it needs...
Native Image Lazy Loading in Chrome Is Way Too Eager
5.2.2020
Interesting research from Aaron Peters on <img loading="lazy" ... >:
On my 13 inch macbook, with Dock positioned on the left, the viewport height in Chrome is 786 pixels so images with loading="lazy" that are more than 4x the viewport down the page are eagerly fetched by Chrome...
Image Lazy Loading
25.11.2019
Lazy loading images is a practice that’s been popular for a decade and for good reason: images are usually the heaviest downloads on a given webpage and avoiding unloading images that are never seen saves the user bandwidth. There are plugins for lazy loading images in every JavaScript...
Optimizing Images for Users with Slow Network Speeds
7.11.2019
For every website, page load time is a critical factor that can make or break the business. Thanks to the better user experience that comes with a fast-loading webpage, those who focus on page load optimization enjoy better conversion rates, better SEO, better retention, and lower bounce rates.
And...
A Look at JAMstack’s Speed, By the Numbers
1.11.2019
People say JAMstack sites are fast — let’s find out why by looking at real performance metrics! We’ll cover common metrics, like Time to First Byte (TTFB) among others, then compare data across a wide section of sites to see how different ways to slice those sites up compare.
First, I’d like...
Digging Into the Preview Loading Animation in WordPress
22.10.2019
WordPress shipped the Block Editor (aka Gutenberg) back in version 5.0 and with it came a snazzy new post preview screen that shows the WordPress logo drawing itself while the preview loads.
That's what you get when saving a post draft and clicking the "Preview" button in the editor. How'd they...
How to Use JPEG 2000 (JP2) for a Faster Images on iPhone (Sponsored)
21.10.2019
Images Slow Down Websites Images slow down the page-loading performance of many websites. Audit tools like Google’s Lighthouse can quickly tell you how many seconds you can save by optimizing your images. When you are delivering to desktops or android devices running Chrome browser, a quick...
Let’s Make a Fancy, but Uncomplicated Page Loader
15.10.2019
It’s pretty common to see a loading state on sites these days, particularly as progressive web apps and reactive sites are on the rise. It’s one way to improve "perceived" performance — that is, making it feel as though the site is loading faster than it actually is.
There’s no shortage of ways...