Web Inspector and Firefox Dollar Functions
Many of you probably didn't know this but WebKit-based like Safari and Chrome, in addition to Firefox, contain special dollar functions within the console object that allow you to grab elements within the current page. While I've not determined the use of each method, a few of them are obvious:
// Dollar method
// Returns an element by ID
$ = function (id) {
return document.getElementById.apply(document, arguments);
}
// Bling-Bling method
// Returns array of nodes found by QSA
$$ = function(selector) {
return document.querySelectorAll.apply(document, arguments);
}
// Broke method
// returns the currently selected element within the console HTML pane
$0 = function toString() { [native code] }
The $1 - $4 methods are returning undefined, oddly enough.
It's not clear to me what the last few methods do. Maybe they're placeholders for feature methods but they continue to be undefined for now.
![CSS 3D Folding Animation]()
Google Plus provides loads of inspiration for front-end developers, especially when it comes to the CSS and JavaScript wonders they create. Last year I duplicated their incredible PhotoStack effect with both MooTools and pure CSS; this time I'm going to duplicate...
![7 Essential JavaScript Functions]()
I remember the early days of JavaScript where you needed a simple function for just about everything because the browser vendors implemented features differently, and not just edge features, basic features, like addEventListener and attachEvent. Times have changed but there are still a few functions each developer should...
![Fancy Navigation with MooTools JavaScript]()
Navigation menus are traditionally boring, right? Most of the time the navigation menu consists of some imagery with a corresponding mouseover image. Where's the originality? I've created a fancy navigation menu that highlights navigation items and creates a chain effect.
The XHTML
Just some simple...
![MooTools Flashlight Effect]()
Another reason that I love Twitter so much is that I'm able to check out what fellow developers think is interesting. Chris Coyier posted about a flashlight effect he found built with jQuery. While I agree with Chris that it's a little corny, it...
$0 returns whatever you have selected in the Elements tab.
These all work in Firebug too, by the way.
Line #15 in the first code segment shows this.
$0 and $1 return the currently selected DOM element and the previously selected DOM element, respectively. I haven’t yet found a use for this while debugging, mainly because selecting elements in the inspector and debugging in the console seem (for me at least) to be disconnected tasks, but maybe there will be a reason some day? ^_^
Not sure about webkit’s inspector, but you can find the API for firebug’s CLI here: http://getfirebug.com/wiki/index.php/Command_Line_API
Perhaps if they plan to use it in the future, they have to reserve it now so that the dom-modifying frameworks don’t start using it :)
Didn’t know about this, the bling-bling method is cool though, haha.
Here you can find all Answers ;) (At the bottom)
http://developer.euro.apple.com/library/safari/documentation/AppleApplications/Conceptual/Safari_Developer_Guide/DebuggingYourWebsite/DebuggingYourWebsite.html
Now I get it, this is why Douglas Crockford says you shouldn’t use $ functions.