Archive for the "javascript" category

A short Modernizr course

Last year, I did a quick 5 min presentation on some of the features available in Modernizr for Web Directions What Do You Know event. From there, Sitepoint & Learnable’s Kevin Yank asked me to put together a short course for learnable.com based on the presentation. So after working on the occasional weekend I put it all together and got it launched just before xmas 2011. Continue reading

Playing with the clipboard in iOS safari

So the other day it hit me that since iOS safari supports contenteditbale it should surely have support the clipboard events and other handy bits and pieces. Like any good hacker I created a testcase to find out basic support of events and getting selection range values, and as expected the support is pretty good. Let’s dive deeper. Continue reading

addEventListener, handleEvent and passing objects

Here’s a super awesome trick I had no idea about until someone pointed out you could do this. addEventListener can take an object as a second argument that will look for a method called handleEvent and call it! No need for binding “this” so it will pass around the context correctly, the context is the object you’ve just set as the event listener callback. Continue reading

Fullscreen HTML5 video

In preparation for a talk I’m doing at Web Directions South I needed to be able to put video into fullscreen mode from within my HTML based slides. In order to do this I imagined I would of needed to use flash but thankfully Webkit nightly, Chrome dev and Firefox nightly have added the ability to put HTML5 videos, and other elements, into fullscreen mode using javascript. The FullScreen API now updated to point to official editor draft, thanks Hans!. Continue reading

I scope, you scope, we all scope for NoScope! JS style element injection quirks in IE

The other day I was writing some updates and improvements for Modernizr, one to detect for generated content support and two to improve stylesheet and element injection. Modernizr already in a few places inserts a stylesheet and a corresponding element to do some tests e.g. generatedcontent, touch, css3transforms and a few others. All this happened multiple times; each test would inject an element and an inline style element, do its test then remove both elements. All this happens while the page is loading and as you can see the more tests that involve these steps exponentially grow the number of times it needs to touch the DOM. Continue reading

Remote debugging with jsconsole, a different take

Ever wanted to remotely access the DOM of a mobile device so you could make changes, test ideas and generally just have a bit of fun. I know I have and I’ve been hacking to create a proof of concept piggy backed on the development of two great projects. The first is Remy Sharps awesome little jsconsole web app that lets you do a bunch of cool stuff using a simple yet elegant interface. The second is a Firefox plugin that allows Firefox to act as a WebSocket server and receive and delegate messages sent from a client. Continue reading

Getting fancy with the console

The trusty console.log() method serves a great functional purpose to write messages to the developer console. But did you know the console object has around twenty other methods you can use? I rarely see developers tapping into the extra power the console provides other than using it as a non-blocking alert. Let’s change that. Continue reading

I’ll have the DOMFileSystem with a side of read/write access please…

Filesystem access has been a pipe dream for web developers for many years. With the ever evolving complexity of web apps and their need to potentially process large amounts of data, filesystem access is the next evolutionary step in order to push web apps to the next level. Thankfully, smart people have been thinking about these issues and defining new and useful specifications that fill those gaps. Eric Uhrhane of Google has been working on the working draft of the File API: Directories and System specification which defines a set of APIs to create a sandboxed filesystem where a web app can read and write data to. Continue reading

Drag out files like Gmail

Google in their quest to keep me busy in trying to figure out how they do their innovative features in Gmail are at it again. First it was drag and drop uploading which used a clever trick to make it work in Chrome which currently doesn’t support the FileReader in their stable release. Now they’ve added the ability to drag out attachments to your file system, allowing you to bypass the usual method of the save dialog. Continue reading