JSONbox – Free HTTP based JSON Storage

jsonbox.io lets you store, read & modify JSON data over HTTP APIs for free. Copy the URL below and start sending HTTP requests to play around with your data store. Oh, this will come in handy for Workshops and quick Proof Of Concepts: curl -X POST ‘https://jsonbox.io/demobox_6d9e326c183fde7b’ \ -H ‘content-type: application/json’ \ -d ‘{“name”: “Jon […]

Visually Search using your Phone’s Camera with The Web Perception Toolkit

The Web Perception Toolkit is an open-source library that provides the tools for you to add visual search to your website. The toolkit works by taking a stream from the device camera, and passing it through a set of detectors. Any markers or targets that are identified by the detectors are mapped to structured data […]

Implementing Dark Mode on adactio.com

Jeremy recently implemented “Dark Mode” on his site. Tanks to CSS Custom Properties the implementation is pretty straightforward (also see my writeup here). But of course, Jeremy added some extra details that make the difference: In Dark Mode images are toned down to make ‘m blend in better, as detailed by Melanie Richards: @media (prefers-color-scheme: […]

Simple Scroll Snapping Carousel (Flexbox Layout / Grid Layout)

Here are two small scroll-snapping carousels that I made. In the top one the items are laid out using CSS Flexbox, whereas the second one uses CSS Grid. The code also works fine with arbitrarily sized .scroll-items elements, they don’t need to have the same width. ℹ️ Want to now more about scroll snapping? Check […]

Idiosyncrasies of the HTML parser

Highly interesting book (in the making) by Simon Pieters, on how HTML parsers work: The HTML parser is a piece of software that processes HTML markup and produces an in-memory tree representation (known as the DOM). The HTML parser has many strange behaviors. This book will highlight the ins and outs of the HTML parser, […]

Optimizing images for the web – an in-depth guide

It’s very easy for unoptimized images to end up on a production site and slow down its initial load considerably. Inexperienced devs usually aren’t aware of this potential problem. They also aren’t aware of a wide range of tools and approaches for optimizing images. This article aims to cover most of the tools and approaches […]

Clicking Buttons: Inconsistent behavior across browsers

Great research by Zell Liew: I noticed browsers were inconsistent in how they handle a click on <button>. Some browsers choose to focus on the button. Some browsers don’t. In this article, I want to show you my test and findings. Then, I want to talk about a way to overcome these inconsistencies. Great to […]

“Can I email…” – Support tables for HTML and CSS in emails

Can I email is like Can I use but specifically for email: which HTML and CSS features are supported by which mail client? They also provide a scoreboard, ranking mail clients based on their support among the 70 HTML and CSS features listed on Can I email. Can I email… Support tables for HTML and […]

pagemap, a mini map navigation for web pages

Many text editors nowadays sport a minimap on the right hand side of the screen. Pagemap is like that, but for webpages: To use it, position a canvas element fixed on your screen, and tell pagemap which elements to include in the map: <canvas id="map"></canvas> #map { position: fixed; top: 0; right: 0; width: 200px; […]

Paint Holding in Google Chrome

One of the features that shipped with Chrome 76 is “Paint Holding”. It’s a technique that removes the “flash of white” – e.g. the white page you briefly see while the browser is loading the next page – when navigation between two pages on the same origin, thus delivering a smoother experience to the user. […]