The other day I had to test an API response based on a file having the incorrect Content-Type of a FormData PUT request.

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September 2015 I had the privelage of giving a talk at JSConfEU 2015 in Berlin. My topic was about what the browser actually does to construct your website and show it on the screen. This is a topic I’ve been digging into for a few years now and it was really fun trying to distill it into a ~25 minute talk.

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Just in time for the launch of Modernizr 3 I’ve been working on a beginners course. This is aimed at people who are getting started in web development and want to know how they can use Modernizr in their workflows. I have 5 vouchers to give away that will give you free access to the course! The first 5 people to tweet the course link with the hashtag #modernizr3course will get a voucher link to access the course for free. Continue reading.

If you’re familiar with iOS development you will know that a UITableView is very efficient when displaying a list of data. A simplification of what it does is display enough cells to fill the viewport plus a few more either side. As you scroll it re-uses cells that are now out of the viewport so a list with thousands of items will only ever use a fixed amount of cells. Highly recommend reading The fine art of UITableViews. Now this has certainly been done before in JavaScript, the best known project being infinity.js, but my approach takes an interesting turn, I avoid heavy DOM operations by using flexbox.

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If you’re unfamiliar with LIFX it’s basically a smart wifi enabled led lightbulb. Lifx recently released a Ruby gem to communicate with it and give it instructions. With winter looming in the southern hemisphere and the sun being up for what feels like 4 seconds at that time of year it’s really hard to get up in the morning so I investigated using their gem to simulate a sunrise effect in time with my alarm on my phone.

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60fps scrolling article got quite a few people excited but also a few smart people to point out some flaws in the approach. I was planning to just update the original article but I’ve compiled so much info about this topic that I thought it would be better to do a follow up article and dive into the detail of the techniques that I tried and some solutions to the critiques made about the last technique.

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Paul Lewis did an interesting article a while back about avoiding unnecessary paints through disabling hover effects as the user scrolls, which is a great approach. The down side being managing all your hover states through a parent class.

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So had an interesting bug the other day where upon refresh, navigating to another page or external site within the same tab on iOS safari would cause some of my content to flash before the page was loaded. What’s interesting is the main layer over the top was a composited layer and the one beneath was not.

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I saw a really cool demo by James Long using Firefoxes implementation of Generators to instrument code so you can stop the execution and step through it like your in the dev tools using break points.

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TL;DR;

iOS6 will keep the network activity spinner around forever, with no fix, if you do a CORS ajax request at any time with preflight the network activity spinner will stay until the tab is closed.

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