(You may already know this, but I didn't. Every day is a school day.) HTML has the concept of the lang attribute. It allows you to say that a specific element contains text in a specific human language. For example, this page starts with: <html lang="en-GB"> That says the entire page is written in English, with the sub-type of Great Britain. This means your browser might offer to translate the page, if that isn't a language you can read. Or it might read the page aloud in a …
Continue reading →
(Written mostly to settle a good-natured disagreement.) One of the great advantages of HTML is that it can call on external resources. Your index.html can load a style.css and display a picture.jpg. But... it doesn't have to use external resources. (I know this isn't news to some of you - but everyone has to start somewhere.) Here are three techniques for inlining external assets. Easy Mode The normal way of adding a stylesheet to HTML is something like: <link…
Continue reading →
Update! It's fair to say no one liked this idea - so I've reverted it. Thanks for all the feedback 🙂 Do you ever see those daft email footers which say "Please consider the environment before printing this email." Like, who the fuck is still printing out their emails? Anyway, a few years ago I went along to a blogging event where someone had printed out one of my blog posts. I was stunned. They'd stuck of loads of my posts (and other people's posts) on a mood board. Because I'm a digital fu…
Continue reading →
AVIF is the hip new image format. It is born out of video compression technology. Modern video streaming services have a complicated relationship with multiple resolutions. A video is usually encoded several time - for high, medium, and low bandwidths. When you start streaming, your playback device usually picks the lowest quality stream to start with. If it downloads it quickly, then it jumps to the higher resolution. You may have noticed this when the first few seconds of a streaming show…
Continue reading →
There's an HTML element called <time>. It is a semantic element. That means robots can read and understand it. For example, if my code says: <p> The concert is <time datetime="2020-12-24">tomorrow</time> </p> Then the computer knows the specific date I'm talking about. A browser could offer to add the event to your calendar, or a search engine could find events which are happening on a specific date. Nifty! Problems in the wild The problem comes when people use abbreviations which may…
Continue reading →
Lynx is a text based browser. You think the people who browse without JavaScript are weird? Lynx doesn't even do images or CSS! It downloads HTML and renders it at blazing fast speed. If you ever wondered just how slow modern web development has made the web - Lynx will show you the meaning of haste. I use Lynx most days. Not as my exclusive browser - I'm not a masochist - but as a handy tool. If I'm on a bandwidth constrained connection, or a site is overloaded, or I just want to browse…
Continue reading →
Apple's HEIC format is... annoying. At the moment, Apple's products are the only mainstream cameras which use it. Forums are littered with people trying to upload HEIC files to web services and failing. So, here are four quick tips for dealing with this formal. Display in browser Absolutely no browser supports HEIC. Not even Apple's own browser supports it. Why? Terence Eden is on Mastodon@edentOK, but *why* is the iPhone's default photo format HEIC if the iPhone's default browser can't…
Continue reading →I want to discuss a (minor) antipattern that I think is (slightly) harmful. Lots of websites use large Javascript libraries. They often include them by using a 3rd party Content Delivery Network like so: <script src="https://cdn.example.com/js/library-v1.2.3.js"></script> There are, supposedly, a couple of advantages to doing things this way. Users may already have the JS library in their cache from visiting another site. Faster download speeds of large libraries from CDNs. Latest…
Continue reading →
Given a social media user's username, how do you get a picture of their avatar? I always used avatars.io - but sadly that service has bitten the dust. So I've switched to unavatar. It's dead easy to use. https://unavatar.now.sh/twitter/edent will return @edent's avatar. You can use GitHub, Facebook, Gravatar, Instagram, Telegram, YouTube, SoundCloud, and a couple of other providers. Simple to use, and easy to embed in an <img> element. It's also open source and looks pretty easy to deploy …
Continue reading →
This is the latest of my many terrible lockdown-induced ideas. I'm saving money on commuting. So I'm spending it on tech-crap I really don't need. I bought a new laptop sticker. Anyway, enough waffle, here's the end result: This uses 2-frame lenticular printing. History No browser supports the <blink> element any more. It used to make text blink. It was a silly idea that got out of hand. And now I have summoned it back to life in physical form. I am bad. Please don't report me to…
Continue reading →
I wanted to see what I was Tweeting on this exact day last year. And all the years before. So I built a website! It's a disgusting hack, and I'm truly sorry for unleashing it on you. Using the API You can't. The Twitter search API only goes back 7 days. This whole idea would be much easier if I had access to the Premium API. But! The Twitter website has no such restrictions. Advanced Search Twitter's Advanced Search allows you to pick specific dates to search for. Here's the string which …
Continue reading →
My Chinese takeaway delivery was late. Very late. I flipped open the confirmation email sent by Just-Eat to double-check I had all the details correct. At the bottom was a "click to call" link. Hurrah! I clicked dial, and this is what filled my screen: An absurdly long phone number. Bemused, I went to inspect the link I'd clicked. This is what it showed: The tel: URl scheme is brilliant. You can write something like: <a href="tel:07700 900123">Call Me!</a> And when you click on…
Continue reading →
