When working with jQuery 1.6.1 and the jQuery Form Example Plugin I found that the examples were being serialized the plan was to use Ajax to send the serialized data back to the server and save it but I didn’t want to have to try and remove the examples server side. So triggering unload on the examples will allow serialize to get the correct data. Example JavaScript below. Continue reading ›
So dealing with Datetime between client and server side can always be fun due to timezones but adding a number of browsers makes it all the more complicated. For our project we are using Joda-Time on the Java side and a mix of technologies on the client side (I will be addressing that soon). So we deiced to pass all datetimes via ISO-8601 the problem came when dealing with the different browsers. IE7 and IE8 both output a string that doesn’t have the milliseconds where Chrome and FireFox did.
On the Java side we used ISODateTimeFormat.dateTime() to parse the incoming date string so we wanted the milliseconds.
To make this work I made a quick JavaScript utility that I can use to output the correct format in UTC time as we wanted. You can see the code below.
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As we know how to hide the address bar in iOS, we may want to tell if a user has that bar showing or not. I use this detection to show instructions to the user to add a site to their home screen if they are not in stand alone mode.
There are two properties we want to look at “standalone” in window.navigator and window.navigator.standalone. We can use the first expression to check if the device supports full screen mode and the second to check if it is in full screen mode. I have checked these with the iPhone and iPad, with iOS versions 3 and 4 if anyone has any issues please post a comment and we can try and work through it.
If you are creating a web app for the iPhone there is an easy to to hide the address bar when opening the page from a link on the users home screen. You simply need to add the following meta tag to your
head. This will also work with the iPad.
1 | <meta name="apple-mobile-web-app-capable" content="yes" /> |
The Problem
The iPad and also the iPhone have a bit of special behavior when it comes to using the HTML5 video tag. They both have the autoplay functionality shut off. This behavior is also extended to any event which the user has not started the event chain. (AKA you can’t do the following)
1 2 | <body onLoad="document.myMovie.play()"> </body> |
What it Means
So what this really means you can not have a playlist of videos where one video is loaded as soon as the first ends. Also having timed events from one video kick off sub videos will not work unless the user clicks on the new video.
Is this a Bug?
No this is as intended by Apple look for the Device-Specific Considerations here. What the idea is that any device that could be charged from a data plan shouldn’t allow auto play. While this idea makes sense the execution is poor. I am currently using a wifi only iPad so there is no reason for this restriction it would be best in my mind to detect if they are using wifi or 3g and react accordingly.
What to Do
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I have been working with the HTML5 video element a bit on both iPad and the Chrome browser. I’ve started to find some odd behavior around the seeked event. First a touch of background about the seeked event. According to the spec the seeked event should fire when the seeking IDL attribute changes to false. This seems to make perfect sense but when actually using the event it seems inconsistent at best.
I have seen three distinct actions that don’t make sense to me.
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While working on a small HTML5 based project for the iPad I found some interesting things with how it handles the poster attribute and defining the video source. The following HTML works fine on Mobile Safari (iPad) and my desktop Chrome.
1 2 | <video id="vidtest" src="big_buck_bunny.mp4" poster='poster.jpg' controls="controls"> </video> |
But moving to the following code works fine in Chrome but on the iPad (Mobile Safari) it will only show the poster and no way to start the video unless you do the pinch zoom to make the video full screen then the controls will show up.
1 2 3 | <video id="vidtest" poster='poster.jpg' controls="controls" > <source src="big_buck_bunny.mp4" type="video/mp4" /> </video> |
Simply using the first style is ok if you are only doing one type of video but if you wanted to include other options this issue limits that ability. But for now if you are targeting iPad just use the first option.
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One feature I have really liked on my blogs recently is the ability to just use Twitter to comment so I went ahead and added the DISQUS Comment system the plugin is straight forward and easy to use with WordPress. Moving forward with new site projects I will be strongly considering using DISQUS instead of an internal comment system, I would suggest checking it out as well as InenseDebate .
While working in PHP I found the need to fill an array with new objects on the fly. So at first I tried the array_fill function that worked fine for values but when I tried an object I found it was the same object in every position meaning if I modified one they all changed. What I needed was a new object in each. The easiest way I found to do that was a for loop.
The following doesn’t work correctly
1 | $arr = array_fill(1,12,new MyObject()); |
So to accomplish the same idea I did the following
1 2 3 4 5 6 7 | $arr=array(); for($i=1;$i<=12;$i++) { //Fill Array with new object $arr[$i]=new MyObject(); } |
I was working with a CMS and found that one file was not downloading correctly people were saying that the file was being zipped up by the CMS. Well it turns out it was the issue with IE6 and a bad MIME Type. The fix is simple for pptx you need the mime type application/vnd.openxmlformats-officedocument.presentationml.presentation once that was added everything was working correctly. With out this a PPTX file will download as a zip.
A few links on the subject: