Javascript Archives - Page 9 of 10 - {5} Setfive

jQuery.trigger weirdness

Earlier today, I was trying to use jQuery to trigger the submission of a form after a radio button was clicked. The form tag looked something like:

So for a regular submit button:

Everything works fine, you’ll see the alert() and the form won’t submit because of the return false.

I ran into issues when I tried to trigger() the submit event with jQuery. I was trying to trigger the submit() event on the form via jQuery. The problem I ran into, was that the saysomething() function was getting called, but the “return false” seemed to have no effect.

The final form looked something like:

For some reason, if you submit the form via a jQuery trigger the form submits even though saysomething() gets called. I’m not sure if this is the expected behavior but it was certainly something of a shock. Anyway, a live version of the form is running here.

Run jQuery each() serially

By Ashish Datta | 2 Comments

jQuery.each() is pretty sweet but earlier today I wanted to run some animations across a set of three elements and since the animate() calls are non-blocking everything was happening at the same time. What I wanted to do was have the functions execute in a serial fashion (1 after the other).

I poked around and it doesn’t look like there’s a native way to do this. After a bit I decided to just whip something up and see how it works. Here’s what I had originally:

That ran fine but everything happened at the same time. The modified serial code looks like:

Basically, what it does is after the first element, the code will delay execution of the each() function until the hasCallbackCompleted flag is set for the correct element.

jQuery blank() modified for password fields

By Ashish Datta | 1 Comment

We’ve been using Jeff Hui’s very awesome jquery.blank plugin for sometime over at Setfive HQ. What blank() is allow you to basically move the labels for text inputs into the input themselves (to save space). We use this technique frequently for login boxes in headers since it’s easier not to have to stick in labels next to text boxes.

The problem is, you can’t use blank() on a password field since a password field won’t display clear text (obviously). To get around this, I’ve always manually stuck in a “shadow” text box next to the password field and toggled the text box or password box in order to make blank() work correctly.

Anyway, I finally got tired of doing this so I decided to patch the plugin to do this automatically. Jeff incorporated the code back into blank() and it’s available on GitHub here.

Happy coding.

javascript – $(document).ready getting called twice? Here’s why.

By Matt Daum | 4 Comments

Recently we found ourselves having a really weird problem on a project: Every time a page was loaded it seemed a bunch of different Javascript functions were being called multiple times and making many widgets on the page break and we couldn’t figure it out. Some of the functions were our own code, some part of the package we were using. After a while we narrowed it down to that all the functions in the

$(document).ready(...);

we’re being called twice. We had never seen this. After about an hour of removing javascript files and just headbanging, and many thanks to Ashish, we found the root cause. We had written in a quick hack for a late proof of concept to string replace on the entire HTML of a page a specific string. We did it this way:

$('body').html($('body').html().replace(/{REPLACETEXT}/i, "More important text"));

Basically we used a regex to parse the entire HTML tree and then replace it with the updated text. Unknowingly this caused the document ready event to be triggered again(though now it makes sense), causing many widgets to get extra HTML.

Let this save you some headbanging.

jQuery UI $.dialog – on the fly HTML

By Ashish Datta | 3 Comments

Wow its been awhile!

We’ve been insanely busy over the last month or so. We launched Setfive Ventures and are anxiously anticipating the launch of both WeGov and OmniStrat in the immediate future. There are also a handful of internal project that should be rolling out before Christmas. Get Excited.

Anyway, the jQuery UI Dialog class is pretty sweet. Basically, it provides a class to display a modal dialog box from a regular old DOM element (a div, span, or whatever.)

One of the thing that isn’t explained well (or at all?) in the documentation is that you can create a dialog with on the fly HTML! I found this out after posting on the Google Group asking why this feature didn’t exist (it does. Ashish fail.)

So if you want to create a dialog with on the fly HTML all you need to do is:

$("<p>Hello World!</p>").dialog();

Pretty sweet.