Category: HTML5
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Saving a Canvas element as an image
Here’s a little tip to allow your users download the contents of a canvas element as an image, without the need for a server. We can do this by using an Anchor tag with a download attribute. Start with creating <canvas> and <a> tags: The <a> tag’s download attribute can be set to a file…
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Paint stencilling with HTML5 canvas
I have recently been playing around with re-writing my Spray paint stencils in Flash using JavaScript and HTML5’s canvas element. One thing I discovered is that since SVGs are natively supported in browsers I can have stencils scaled to any size and remain crisp, unlike the Flash version which used transparent PNGs. I have implemented…
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Javascript voice control
Since Chrome 25 we have had access to the new Web Speech API which allows us to create web apps that can utilse voice to text or voice control with a microphone. I have been wanting to experiment with this for quite a while so I built simple example to using voice commands to control…
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Reverse engineering Captivate for HTML5 widgets
Adobe Captivate is pretty horrible, especially the HTML5 output. I feel like I’m banging my head against a wall every time I use it. The HTML5 output is riddled with bugs and most of the features simply don’t work. If there is one upside to the HTML5 publishing though (and there aren’t many), it’s the…
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A new blog design
PurpleSquirrels has gone responsive. I have just flicked the switch on the new PurpleSquirrels design. The new design – which I have been working on over the last few weeks – is now responsive which will make it much easier to read content on mobile devices as it adapts to smaller screens. I had been…
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Webcam to canvas or data URI with HTML5 and Javascript
This post has been sitting around unfinished since April so I thought I should finish it and get it out there. In this post I am going to show how you can capture an image from a webcam via JavaScript and convert it to a Data URI which can then be saved in a database…
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Creating HTML5 widgets for Adobe Captivate 6/7
I decided to write this post due to the frustration and lack of information out there on how to make HTML5 widgets for Adobe Captivate. There is almost no documentation on this and the only useful article I could find was riddled with mistakes. My approach may not be the best but this should get…
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Windows 8 start screen in HTML, CSS and Javascript
About 7 or 8 months ago I built a tile based launch page at work to launch learning modules which looked similar to the Windows 8 start screen. When I had spare time I kept building on and adding 3D animations to match it even closer to Windows 8. Then I kind of forgot about…
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JS Transform Handles
The other day I was playing around with Mozilla’s Popcorn Maker and I had the idea of using HTML/JS/CSS to create transformable divs using transform handles and a bounding box. I did a quick search for any existing examples of HTML transform handles but i couldn’t find anything so I decided to give it a…
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Leveraging iOS hardware via the browser with Javascript
Just another quick post tonight. I have bigger one lined up for tomorrow I promise. I just wanted to show a little experiment I did a while back with JavaScript – accessing the Accelerometer and Compass data in Safari on the iPad. Below is a short video demonstrating it if you don’t have access to an…