So I pulled open the console and wrote a little jQuery:

$("div.diff-view tr .gd").closest("tr").toggle().length;

It can take a little time to run depending on the number of lines it needs to hide. The .length is there just to stop the console from showing you all of the elements it toggled.

I’ve given up on actually making an easy to install bookmarklet in my wordpress, something keeps converting all my links to javascript:void(0) and I don’t care enough to debug it.

If you want to bookmark it – here is the code for a bookmarklet:

javascript:$("div.diff-view tr .gd").closest("tr").toggle();false

If you wanted to see my slides: http://gnarf.net/special-fx – the source for the slides and demos are available at https://github.com/gnarf37/special-fx

I’ll probably add more to this post later, but yeah… Great weekend! Thanks everyone who came to the conference!

It is a front-end for jQuery.ajax() and takes the same options/arguments as any standard ajax call, just makes sure that only one ajax call can be running at a time.

Take a look at the gist.

/*
* jQuery.ajaxQueue - A queue for ajax requests
* 
* (c) 2011 Corey Frang
* Dual licensed under the MIT and GPL licenses.
*
* Requires jQuery 1.5+
*/ 
(function($) {

// jQuery on an empty object, we are going to use this as our Queue
var ajaxQueue = $({});

$.ajaxQueue = function( ajaxOpts ) {
    var jqXHR,
        dfd = $.Deferred(),
        promise = dfd.promise();

    // queue our ajax request
    ajaxQueue.queue( doRequest );

    // add the abort method
    promise.abort = function( statusText ) {

        // proxy abort to the jqXHR if it is active
        if ( jqXHR ) {
            return jqXHR.abort( statusText );
        }

        // if there wasn't already a jqXHR we need to remove from queue
        var queue = ajaxQueue.queue(),
            index = $.inArray( doRequest, queue );

        if ( index > -1 ) {
            queue.splice( index, 1 );
        }

        // and then reject the deferred
        dfd.rejectWith( ajaxOpts.context || ajaxOpts, [ promise, statusText, "" ] );
        return promise;
    };

    // run the actual query
    function doRequest( next ) {
        jqXHR = $.ajax( ajaxOpts )
            .then( next, next )
            .done( dfd.resolve )
            .fail( dfd.reject );
    }

    return promise;
};

})(jQuery);

/*
 * jQuery.ajaxQueue - A queue for ajax requests
 * 
 * (c) 2011 Corey Frang
 * Dual licensed under the MIT and GPL licenses.
 *
 * Requires jQuery 1.5+
 */
(function(a){var b=a({});a.ajaxQueue=function(c){function g(b){d=a.ajax(c).then(b,b).done(e.resolve).fail(e.reject)}var d,e=a.Deferred(),f=e.promise();b.queue(g),f.abort=function(h){if(d)return d.abort(h);var i=b.queue(),j=a.inArray(g,i);j>-1&&i.splice(j,1),e.rejectWith(c.context||c,[f,h,""]);return f};return f}})(jQuery)

Back in 2007 we released the jQuery Color Plugin, and it has been providing you with color-based animations ever since. We are now preparing a second version of this plugin which adds an API, RGBA, HSLA, and many other features. It is time for a beta! The repository for this plugin can be found at github.com/jquery/jquery-color.  There are also uncompressed and minified versions available on code.jquery.com.

New Feature Overview:

RGBA

We now support RGBA color values. In browsers that don’t support RGBA, the nearest backgroundColor to the element will be used to calculate a “blended” approximation of the color. Although this isn’t “true” alpha, it will at least provide the illusion of alpha when dealing with solid background colors.  This is a screenshot of Opera 10, Chrome 10, Firefox 3.6, and IE 6 all running this demonstration of alpha blending:

HSLA

We also now support using HSLA color values across all browsers, with the execption of alpha, which uses the same techniques described above.

Easy-to-use API

Instead of a simple group of private utility methods, $.Color() now creates a new Color object. The new Color object can be initialized in a few different ways: color names, hexidecimal color codes, css style rgba/hsla, an array of rgba values, or an object with the color properties. There are now helper methods for each color property, like .red() and .hue() that can get or set the particular value. Combined with helper functions like .toRgbString(), .transition() and .is(), $.Color can now handle whatever color needs you might have. Refer to the README on github.com/jquery/jquery-color for an overview of all the new functions available. No longer is jQuery.Color just providing you with animation of simple colors, you can now use its API to do complex color calculations and animations!

Quick Examples:

// Create a red Color object:
var red = $.Color( 'rgba(255,0,0,1)' ); // using a css string

// Create a red Color object, then make orange:
var orange = $.Color( '#FF0000' ).green( 153 );

// Get the color halfway between red and blue:
var between = $.Color([ 255, 0, 0 ]).transition( "blue", 0.5 );

Animating Partial Colors

We have added support for only defining one or two properties of a color object so that you can animate using a partial color like this:

// desaturate the background of this element
elem.animate({
    backgroundColor: $.Color({ saturation: 0 })
}, 1000);

Reporting Problems / Requesting Features:

If you find any problems with the new color plugin, or would like to request a feature, please create a github issue.

Also, we’d love to see and showcase some excellent uses of the new $.Color beta, so please be sure to share it with us in the comments.

Queues in jQuery are used for animations. You can use them for any purpose you like. They are an array of functions stored on a per element basis, using jQuery.data(). The are First-In-First-Out (FIFO). You can add a function to the queue by calling .queue(), and you remove (by calling) the functions using .dequeue().

To understand the internal jQuery queue functions, reading the source and looking at examples helps me out tremendously. One of the best examples of a queue function I’ve seen is .delay():

$.fn.delay = function( time, type ) {
  time = jQuery.fx ? jQuery.fx.speeds[time] || time : time;
  type = type || "fx";

  return this.queue( type, function() {
    var elem = this;
    setTimeout(function() {
      jQuery.dequeue( elem, type );
    }, time );
  });
};

The default queue – fx

The default queue in jQuery is fx. The default queue has some special properties that are not shared with other queues.

1. Auto Start: When calling $(elem).queue(function(){}); the fx queue will automatically dequeue the next function and run it if the queue hasn’t started.
2. ‘inprogress’ sentinel: Whenever you dequeue() a function from the fx queue, it will unshift() (push into the first location of the array) the string "inprogress" – which flags that the queue is currently being run.
3. It’s the default! The fx queue is used by .animate() and all functions that call it by default.

NOTE: If you are using a custom queue, you must manually .dequeue() the functions, they will not auto start!

Retrieving/Setting the queue

You can retrieve a reference to a jQuery queue by calling .queue() without a function argument. You can use the method if you want to see how many items are in the queue. You can use push, pop, unshift, shift to manipulate the queue in place. You can replace the entire queue by passing an array to the .queue() function.

Quick Examples:

// lets assume $elem is a jQuery object that points to some element we are animating.
var queue = $elem.queue();
// remove the last function from the animation queue.
var lastFunc = queue.pop();
// insert it at the beginning:    
queue.unshift(lastFunc);
// replace queue with the first three items in the queue
$elem.queue(queue.slice(0,3));

An animation (fx) queue example:

Run example on jsFiddle

$(function() {
    // lets do something with google maps:
    var $map = $("#map_canvas");
    var myLatlng = new google.maps.LatLng(-34.397, 150.644);
    var myOptions = {zoom: 8, center: myLatlng, mapTypeId: google.maps.MapTypeId.ROADMAP};
    var geocoder = new google.maps.Geocoder();
    var map = new google.maps.Map($map[0], myOptions);
    var resized = function() {
        // simple animation callback - let maps know we resized
        google.maps.event.trigger(map, 'resize');
    };

    // wait 2 seconds
    $map.delay(2000);
    // resize the div:
    $map.animate({
        width: 250,
        height: 250,
        marginLeft: 250,
        marginTop:250
    }, resized);
    // geocode something
    $map.queue(function(next) {
        // find stackoverflow's whois address:
      geocoder.geocode({'address': '55 Broadway New York NY 10006'},handleResponse);

      function handleResponse(results, status) {
          if (status == google.maps.GeocoderStatus.OK) {
              var location = results[0].geometry.location;
              map.setZoom(13);
              map.setCenter(location);
              new google.maps.Marker({ map: map, position: location });
          }
          // geocoder result returned, continue with animations:
          next();
      }
    });
    // after we find stack overflow, wait 3 more seconds
    $map.delay(3000);
    // and resize the map again
    $map.animate({
        width: 500,
        height: 500,
        marginLeft:0,
        marginTop: 0
    }, resized);
});

Queueing something like Ajax Calls:

Originally posted here – run jsFiddle demo

  // jQuery on an empty object, we are going to use this as our Queue
  var ajaxQueue = $({});

  $.ajaxQueue = function(ajaxOpts) {
    // hold the original complete function
    var oldComplete = ajaxOpts.complete;

    // queue our ajax request
    ajaxQueue.queue(function(next) {

      // create a complete callback to fire the next event in the queue
      ajaxOpts.complete = function() {
        // fire the original complete if it was there
        if (oldComplete) oldComplete.apply(this, arguments);

        next(); // run the next query in the queue
      };

      // run the query
      $.ajax(ajaxOpts);
    });
  };

// get each item we want to copy
$("#items li").each(function(idx) {

    // queue up an ajax request
    $.ajaxQueue({
        url: '/ajax_html_echo/',
        data: {html : "["+idx+"] "+$(this).html()},
        type: 'POST',
        success: function(data) {
            // Write to #output
            $("#output").append($("<li>", { html: data }));
        }
    });
});

Another custom queue example

Run example on jsFiddle

var theQueue = $({}); // jQuery on an empty object - a perfect queue holder

$.each([1,2,3],function(i, num) {
  // lets add some really simple functions to a queue:
  theQueue.queue('alerts', function(next) {
    // show something, and if they hit "yes", run the next function.
    if (confirm('index:'+i+' = '+num+'\nRun the next function?')) {
      next();
    }
  });
});

// create a button to run the queue:
$("<button>", {
  text: 'Run Queue',
  click: function() {
    theQueue.dequeue('alerts');
  }
}).appendTo('body');

// create a button to show the length:
$("<button>", {
  text: 'Show Length',
  click: function() {
    alert(theQueue.queue('alerts').length);
  }
}).appendTo('body');