I am vain. I like to know which of my blog posts have "done numbers". I get a little thrill knowing that an old post I wrote has been read by someone in a land I've never visited. I'm curious and want to know if a newsletter has linked to me. At the same time, I don't want to know too much about people. I don't want to stalk them around the web. I refuse to care how long they spend with me. I…
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Code Golf is the art/science of creating wonderful little demos in an artificially constrained environment. This year the js1024 competition was looking for entries with the theme of "Creepy". I am not a serious bit-twiddler. I can't create JS shaders which produce intricate 3D worlds in a scrap of code. But I can use slightly obscure JavaScript APIs! There's something deliciously creepy about…
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The Web Crypto API is, thankfully, nothing to do with scammy cryptocurrencies. Instead, it provides access to powerful cryptographic features which were previously only available in 3rd party tools. So, is it possible to build a TOTP code generator without using any external JS libraries? Yes! And it is (relatively) simple. Here's the code that I've written. It is slightly verbose and contains…
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I love OpenFreeMap it is a quick, easy, and free way to add beautiful maps to your Open Source projects. With the latest release of MapLibre-GL I wanted to see if there was an easy way to use both to make an interactive globe with clustered markers. Spoiler alert: yes! Basic Globe Here's a basic example which I've trimmed down from this example. When you load the below code, you'll get a…
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This has to be the most infuriating bug report I've ever submitted. I went to type in my 2FA code on a website - but no numbers appeared on screen. Obviously, I was an idiot and had forgotten to press the NumLock button. D'oh! I toggled it on and typed again. No numbers appeared. I switched to another tab, my numbers appeared when I typed them. So I was reasonably confident that my keyboard was…
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Whenever I open Twitter in a new tab on my phone, the page layout looks weird for a few seconds. It starts out looking like the desktop view and then, after a few seconds, it snaps back to the mobile view. What's causing this? Try opening this link to a window size detector in a background tab. Then visit that tab. On Chrome, this is what I see. If I hit the refresh button on that tab, the …
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I'm a weirdo - I fully admit that. As part of my home working set up, I use a vertical monitor. I read and write a lot of long documents - and this form factor suits me perfectly. I've been doing this for a long time. It is a natural part of my workflow. For anything longer than an email, it's the perfect orientation. Most Linux apps work just fine like this - although menu buttons tend to…
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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…
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A few months ago, British Airways' customers had their credit card details stolen. How was this possible? The best guess goes something like this: BA had 3rd party JS on its payment page <script src="https://example.com/whatever.js"></script> The 3rd party's site was hacked, and the JS was changed. BA's customers ran the script, which then harvested their credit card details as they were…
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Scratching my own itch here... GitHub users have a username (mine is @edent) and have a user ID number (mine is #837136). If you want to redirect a user ID to a username, you can use the little service I've cobbled together: https://edent.github.io/github_id/#837136 That will take your browser to my GitHub page, using nothing but my ID. Why? Some login services only give you the GitHub…
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For my contact page, I wanted a generic calendar icon to let people view my diary. Calendar icons are almost always a skeuomorph of a paper calendar, but I wondered if I could make it slightly more useful by creating a dynamic icon. Here it is, an SVG calendar which always display's today's date: The background image is derived from the Twitter TweMoji Calendar icon - CC-BY. Text support in …
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I've started using Google Cloud Vision for running text detection on OpenBenches images. There's just one problem - Google limits the size of the files that it will accept to 4MB. Why? Who knows! Obviously, it's easy to shrink an image server-side, but how do we do it in the browser? First, let's take a bog-standard file chooser and add a <canvas> element. <input id="userFile" type="file"…
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