Boolean Attributes in Custom Angular Components
I like clean code so being able to have boolean attributes like required in my custom Angular components makes me happy. To do it however you need an extra bit of javascript.
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Before I loose it again, one of the best references for creating accessible web sites is the ARIA Authoring Practices Guide (APG). It has good examples of how to create some complex components like navigation with submenus and treegrids, as well as best practices.
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Please! Stop with the mobile web sites! If you are using browser agent strings to change your CSS/layout don't! Use responsive CSS instead. There are other situations when you need a small window and devices that have a small screen where your web site does not work.
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Minimal Accessible Tooltip
Doing a lot of web accessibility fixes, I wondered what would be the minimum amount of code to create a WCAG 2.1 compliant custom tooltip. Unfortunately, it had to include Javascript. Here is what I came up with.
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If you are wanting to apply accessibility labels onto an image, here are the label (
alt,title,aria-description,aria-label) priorities (highest first):aria-description(witharia-label,altortitle);aria-label;alt. Notearia descriptiondoes not get read out if there is no other label attributes. (Tested on Windows, NVDA, and Firefox and Edge). -
Email dates in Javascript
Javscript is missing functions to format dates in some common formats, such datetime-local inputs and RFC 5322 (email dates) in a non-obsolete way. While Date.toUTCString() is close, the timezone is now obsolete (though it is handy for HTTP Date and other such headers). Here's the basic functions to get the right formats
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Visibility and CSS Accordians
When changing a reworked menu to have accordian animations, I came to the realisation that I have been missing a big issue when using
max-heighttransitionanimations — accessibility. I detail a simple fix in this article. -
Can't touch list
Turns out screen readers really don't like you playing with the
displayCSS property on lists, for example to change it to an inline list — it will cause lists items to be read like a paragraph. Here's how to do without upsetting the screen readers. -
New Zealand Low Power Networks (LTE-M & NB-IoT)
I have started experimenting with low power wide area networks (LP-WAN) in New Zealand using a u-blox SARA-R410-02B. Here is what I have experimented with so far.
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JS Binary Decoder
I have recently been dealing with parsing binary data packets from various sources, and have published two NPM libraries from it: binary-decoder and sbd-direct-ip. Here's how they came to be.
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Starting with ESP32
I started developing my trap-watch project on an ESP32-CAM using the ESP IDF. Here is the newbie difficulties I ran into.
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Blob blob blob blob Stayin' Alive Stayin' Alive
Upon recently trying Deezer again, I found their web app ate all my memory when running in Firefox, so I decided to see if I could find out why. I got as far as memory-file-data/string and Blobs. Here's how.
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A new Litter Survey
In a culmination of litter surveys and litter picks, linked data and data exploration, and remoteStorage and ActivityPub, I have created a web-based litter pick/survey app that I hope will allow federated citizen science.
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Release the Beast
I just created a Gitlab CI job to create a release with information from a CHANGELOG.md file for some of my projects. Here's how I did it.
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yarn add --dev webdriverio
I finally started implementing UI testing on first-draft using WebdriverIO. While writing tests was easy, getting the tests running was a little more difficult. Here is how I did it.
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Hooray! My new blog is live! Based on Sapper, using MongoDB and eventually ActivityPub and ActivityStreams, it will be my federated posting hub to the world.
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tmux List and Reattach
Using
tmuxfor your terminal multiplexer but want an easy to reattach to a session? Here's a small bash script to do it. -
Testing vue components
I recently needed to test that some Vue components were creating the correct HTML. To do this, I decided to create snapshots of Object representations of the rendered HTML.
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No More Numbers
HTML5 number inputs aren't useful, but tel inputs, have all the power
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Photo Layout